This is a self-custody wallet you are the one holding the crypto the whole time and when you earn interest is not through c5 instead it is to true defy you to own the keys this it's not to say that defy doesn't have its own set of risks when using something like trust wallet you have the option to just simply hold your crypto or if you want you to have the option to participate in d5.
for example with something like a trusted wallet if you enter an interest you can do this by staking defy lending providing liquidity yield farming and nft farming this is entirely different in this case you are giving your money to smart contracts or you are delegating your rights to a staking protocol in that case though there are risks of hacks there is a risk of smart contract bugs again you do not have to participate in this type of interest-earning and when it comes to staking with trust wallet
most of the crypto that you stake is self-custody staking meaning that you hold on to your coins all you are doing is delegating your voting right so the risk there is that the validator or the staking poll won't pay you the rewards but you get to hold on to your coins so the risk is on the lower end so when it comes to trust wallet you can simply use it and just hold your crypto on there you don't have to participate in d5.