I am going to buy $100 every month..
did you buy it through a centralized exchange? if that's true, you should move your assets to a non-custodial wallet where security is guaranteed and free from intervention. moreover, if you plan to invest in the long term, you need a wallet that can store all your bitcoin assets and prevent your assets from being taken away if at any time the exchange collapses.
even though storing bitcoin assets in a non-custodial wallet is quite complicated for some people because they need to protect the private keys and security of their devices, it is much better to store bitcoin assets in a non-custodial wallet. and the good thing is that you can freely control all bitcoin assets in your non-custodial wallet.