At current price of ether its good to buy it and HODL for a next big pump. And for BTC I will say only sell it in the next big bull run. 
i think eth good buy above bitcoin, because eth price this now is cheap
potential can incraese 6x, if hold long term
with a cheap price, of course we can make a big profit,
Whether I buy or not, I think it depends on your decision
and with us buying ethereum at this time and selling it when the price rises, of course it will be profitable