May i answer it ?
if you want for long term investment so you can choose bitcoin, if you want for short investment maybe you can choose altcoin.
and for altcoin, there are so much altcoin, you should consider it carefully by :
- coin age (the older the better, means it stable)
- coin volume 24h
- coin marketcap
- coin total supply
- their community (how the dev comunicate with thir community is active of not)
from the point-point above, you can consider and think the future of the alt coin is good or not.
CMIIW