What are the four crypto currencies that I should buy and keep untouched for at least five years?
For me you should invest in bitcoin, since it is the most long-running existing cryptocurrency coin as of this moment. Also it is the best time to invest with this since the price is too affordable to buy. Also I suggest ETHl
If you want to invest and forget about coins for such a long time, then it is best to choose Bitcoin, it is the most stable, but in 5 years a lot can change in crypto.