Basics
Understanding Self-Custodial Wallets
Learn what self-custodial wallets are, why self-custody matters in crypto, and how Borrow by Sats Terminal uses embedded Privy wallets to give you full control of your assets with no KYC required.
Learn the key differences between custodial and non-custodial crypto lending, how each model works, their risks and benefits, and why self-custodial lending matters for Bitcoin holders.
When you lend or borrow cryptocurrency, one of the most important questions to ask is: who holds the assets? The answer defines whether a service is custodial or non-custodial, and it has massive implications for your risk profile, privacy, and control.
In traditional finance, custody is straightforward. Banks hold your money, brokerages hold your stocks, and you trust these regulated institutions to keep your assets safe. Crypto introduced something revolutionary: the ability to be your own custodian through self-custody.
This guide breaks down both lending models, compares their risks and benefits, and explains why the distinction matters more than ever after the crypto lending collapses of 2022.
Custodial lending operates similarly to traditional banking. You deposit your crypto with a company, and that company manages the lending process on your behalf.
Popular custodial lending platforms have included companies like Celsius, BlockFi, Nexo, and Ledn. These platforms operate within centralized finance (CeFi), where a company acts as the intermediary for all transactions.
The most significant risk of custodial lending is counterparty risk. When you deposit crypto with a custodial platform, you are trusting that company to:
The 2022 crypto lending crisis demonstrated exactly what happens when custodial platforms fail at these responsibilities. Celsius Network froze $4.7 billion in user assets before filing for bankruptcy. BlockFi followed shortly after, as did Voyager Digital. In each case, users who had deposited crypto discovered they were unsecured creditors with little hope of recovering their full funds.
Non-custodial lending, powered by decentralized finance (DeFi), eliminates the central intermediary entirely. Instead of trusting a company with your assets, you interact directly with smart contracts on a blockchain.
DeFi lending protocols like Aave, Compound, and Morpho operate this way. They are transparent, permissionless, and run entirely on code.
Non-custodial lending is not risk-free. The primary risks include:
Understanding the practical differences helps you make an informed decision about which model fits your needs.
With custodial lending, the platform holds your private keys. You have an account balance on their system, but you do not have direct blockchain access to your assets. If the platform goes offline, restricts withdrawals, or freezes accounts, you cannot move your crypto.
With non-custodial lending, you retain your private keys at all times. Your assets are locked in smart contracts that you can interact with directly. No single entity can freeze your funds or prevent you from withdrawing (as long as you meet the smart contract's collateral requirements).
Custodial platforms operate as black boxes. You typically cannot verify how your deposited assets are being used, what the platform's actual reserves are, or how much risk they are taking with your funds. Some platforms have attempted proof-of-reserves, but these snapshots can be misleading.
Non-custodial protocols are fully transparent. Every deposit, loan, interest payment, and liquidation is recorded on the blockchain. Anyone can audit the protocol's total value locked, its utilization rates, and its risk parameters in real time.
Custodial platforms are subject to regulations in their jurisdictions. This can be a positive (consumer protections) or a negative (account freezes, geographic restrictions, mandatory KYC). Regulatory uncertainty has been a major challenge for custodial lenders.
Non-custodial protocols exist as code on a blockchain. While regulatory frameworks for DeFi are evolving, the permissionless nature of these protocols means they are accessible globally without geographic restrictions.
Custodial platforms set interest rates based on their business model, often offering promotional rates to attract deposits. These rates may not reflect actual market conditions and can change without notice.
Non-custodial protocols use algorithmic interest rates determined by supply and demand. When borrowing demand is high, rates increase; when demand is low, rates decrease. This creates a more efficient and market-driven pricing mechanism.
The events of 2022 provide the clearest illustration of why custody matters in crypto lending.
In every case, users had surrendered custody of their assets to a centralized entity. That entity made risky decisions with customer funds, and when those decisions went wrong, customers bore the losses.
During the same period, major non-custodial lending protocols continued operating normally. Aave, Compound, and Maker processed loans, liquidations, and withdrawals without interruption. Some users were liquidated due to falling collateral values, but the protocols themselves functioned exactly as designed. No user lost funds due to platform mismanagement because there was no platform to mismanage them.
Borrow by Sats Terminal is built on the non-custodial model. As a Bitcoin-backed stablecoin lending aggregator, it connects you directly to established DeFi lending protocols without ever taking custody of your assets.
Borrow provides a self-custodial Privy wallet that gives you full ownership of your private keys. When you deposit Bitcoin as collateral and borrow stablecoins, the entire process happens through smart contracts on-chain. Sats Terminal never holds your funds, never has access to your private keys, and cannot freeze or redirect your assets.
Borrow aggregates multiple DeFi lending protocols to find you the best rates and terms. This aggregation layer adds convenience without adding custody risk. You still interact directly with the underlying protocols through your self-custodial wallet. Borrow simply surfaces the best opportunities and simplifies the multi-step process into a streamlined interface.
Because Borrow operates in a fully non-custodial manner, there is no need for KYC verification. You connect your wallet, choose your terms, and execute your loan. The process preserves the permissionless, private nature of decentralized finance while making it accessible to users who might find raw DeFi protocols intimidating.
The best lending model depends on your priorities and risk tolerance.
The crypto industry has been steadily moving toward non-custodial solutions. The 2022 lending crisis accelerated this trend significantly. More Bitcoin holders now recognize that the benefits of self-custody, while they come with a learning curve, far outweigh the convenience of handing assets to a third party.
Platforms like Borrow by Sats Terminal are helping bridge the gap by offering the security of non-custodial lending with the simplicity that users expect from custodial services.
Regardless of which model you choose, follow these practices to protect your assets:
The distinction between custodial and non-custodial lending is one of the most consequential decisions in crypto. Custodial lending offers convenience at the cost of counterparty risk. Non-custodial lending offers security and transparency at the cost of a steeper learning curve.
The collapses of Celsius, BlockFi, and Voyager proved that counterparty risk in crypto is not theoretical. Billions of dollars in user funds were lost because users trusted centralized entities with their assets.
Non-custodial solutions like Borrow by Sats Terminal demonstrate that it is possible to have both security and usability. By aggregating DeFi lending protocols through a self-custodial wallet, Borrow eliminates custody risk while keeping the experience simple and accessible for Bitcoin holders looking to unlock the value of their holdings.
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