While exchanges can be a convenient place to buy and sell cryptocurrencies, they are not the best option for long-term storage. This is because, when you store your tokens on an exchange, you are entrusting the exchange with control of your private keys, which means that you do not have full control over your assets. Additionally, exchanges are vulnerable to hacking and other security breaches, which can put your assets at risk.
Using a separate, non-custodial wallet such as the LEAP Wallet is generally considered to be a safer option for long-term storage. With a non-custodial wallet, you control your own private keys, which means that you have full control over your assets. Additionally, non-custodial wallets offer added security features such as seed phrase recovery and Ledger support.