if you believe and believe that BTC will bring you into a big profit, just go ahead and decide it. but my advice is not to be too in a hurry, learn more so you don't regret it later.
knowledge very is needed because with that knowledge will help you in choosing and thinking.
choose well and according to your taste but also you have to understand so you can be more confident about Altcoin.
not all coins are good so don't rush into making choices. Altcoin is different from Bitcoin and there is no Altcoin that matches Bitcoin even though Altcoin can be profitable.