Broad diversification is key to success in investing.
Saving money in 2 coins or stocks can wipe half of your capital if one of the two goes south.
Put your dough in 5-10 coins, if one of them collapses you only lose 10-20% of your capital and can quick recover your losses. Read what professional investors do, they recommend investments spread over 10-20 ventures. Above 20 is difficult to keep track of. But 5 is a bare minimum, everyone can keep track of 5 coins and be insured against large unexpected hits.

In crypto broad diversification is picking coins with original code that are not Bitcoin clones. You diversify the software and the devs, programming languages.