For a long-term perspective, I think it's worth buying only bitcoin and etherium, more I think there's nothing to do at all, because in the long run these coins can give serious capital to the holders of these coins.
There was a post by someone here saying that he earned at least 50x from small cap coins.. Do you think it's a good choice for newbies like me?
You have 2 ways:
1. SafeInvest in BTC, ETH or in top-10 coins. Very high chance, that you will take profit, but profit won't be much.
2. More riskyInvest in coins with small market cap. Your profit may be huge, risk is higher.
I suggest you spend you time in seeking coins with small cap and invest at least in 3-4 coins/tokens.
Take a look at these:
TNB, DEEX, QSP, WABI