You shouldn't trust any custodial service with your bitcoin. Any custodial services is able to freeze your fund at any time for any reason. There's also the possibility that they get hacked or they are closed at any time. When you use a custodial service, you don't actually own any bitcoin.
You should always use non-custodial wallets, so you can have full control over your fund.
That’s true, but anyone who is looking for investment and making compound interest would still have to make use of custodial wallets. Even as of recent I have been seeing tweets from Coinbase CEO (Brian Armstrong) and Kraken CEO (Jesse Powell) that advises people to ditch centralized exchanges and wallets, because regulators can decide at any moment to freeze accounts belonging to people. So that makes them a pretty bad choice.
The best option that the op has here which would give him full control over his coin is by HODL. There are so many decentralized and non-custodial wallets that he can use to hold his Bitcoin, the value will still go up, we know that for sure.