It is a good move that you've made.

Many are expecting that most of the altcoins right now will disappear in the near future for some reasons like lack of support from the investors, lack of development (abandoned coin) and the coin has just created to scam other people that is why I'm holding Bitcoin right now and a bit of ETH since I believe that these 2 will exist in the next years and maybe decades.

What happened in 2017 is that most of the altcoins followed the move of Bitcoin. Now if Bitcoin will make a parabolic move again, I don't know if the altcoins will follow it but one thing is for sure an altcoin season will happen but I don't know when.