Don't select 1 altcoin, but create a basket of altcoins. It would be much more better, because I stick to rule, don't rely on 1 alts, even it is ethereum or another top crypto.
You give the right advice, but it is also important not to get carried away with a variety of coins, you need to clearly understand what you buy, buy all the top coins are not the best solution, because not all of them are reliable in terms of profit