BTC, ETH and ADA are great choice to picks. ADA would be difficult to maintain on long-term but both BTC and ETH are great choices regardless of the event situation right now. Just collect up your salary to these picks like what you are currently doing right now and keep stacking up those coins, since these two will still be strong in the future, so won't be hurt to hodl it.
I agree about choosing BTC and ETH. But ADA seems not a really good choice for long-term holding. In my own view, ADA price doesn't increase very significantly, the price move of this coin looks rather slow. I think it is better to exclude ADA and choose BNB coin, BNB seems more convincing to buy and hold long term. BNB is the coin from the biggest exchange in the world (Binance) that has many functions, and it also has a burning program. Burning program will decrease the number of BNB supply and increase the value significantly.
I met an 8 grade student last night and he said I am investing my small savings in ETH and BTC
for a moment I was shocked and looked at him. If he is smart for invest at this age - what is he going to do when he will grow up. Kids are getting very smart these days