ETH still swimming in the 300$ + river ,what do you think will happen if ETH jumps to 900 or 1000$?
ETH cant jump to 900 or 1000 by itself, i mean locally, only ETH. If it jumps to 1k, Bitcoin must be somewhere in 30k level
So not a big deal, your friens make right choice, it is not so risky and can bring them profit!