i dont like it when my coins leave my wallet. i like to keep everything in one place lol.
thats why investing coins doesn't seem appealing to me
Holding is a good method too but others preferred to not let their coins sleep in their wallet.
You will soon learn any method of growing your btc.
And you must accept that sometimes , there is time that your coins needs to leave from your wallet.
If you bought bitcoin before some days when it was extremely cheap then you can see the profit these days to sell all of them.
Or you can hold even more longer maybe bitcoin price will increase much more.