My experience shows that you need to invest in different coins and not be a supporter of one or two coins. Anything can happen and your risks need to be distributed
If you have to do this, it must not be in just anyhow coin, you have to invest in coins that you are very sure of, even if it is one, the coin might be worth more than every other coins available out there when the price pumps, it all depends on the project and the value it is adding to the market.
For me, if it is only bitcoin that I have, I would not regret it no matter what people say, because I am sure bitcoin is able to give me in future what 20 coins cannot give me, so why stress and bother myself over those coins that will keep giving me heart attack over my investment.