The BTC has made history today and broke its all time high record. It is currently trading around $ 20500 to 20600. BTC Dominance Index is around 65% which is very High. I personally think that it is the Right time to take entry in Good Alt coins ( Ranking from 2 to 20 on coinmarketcap). I believe that History of 2017 will be repeated soon. We will soon witness Huge rally in Alts. It should happen when BTC will stabilize around current levels and BTC dominance Index comes down to below 60%.
A lot of depends from altcoin. How useful it will be for society, what problems it will help to solve.
For example now ecological programs appear that help to solve ecological problems. Here is some information https://moss.earth/blog
The air and lands pollution becomes bigger with every year. And there is a big demand in ecological protection.