Well I guess in retrospect yes the coin that you would need to have held is Ethereum
At the current market price you would have had a pretty strong ROI
Take Stratis for example. If you invested 7 Bitcoins in March/April and just held them you would now have 1022 Bitcoins.
Research, knowledge and experience is your friend when it comes to trading.
Don't just on the next pump and dump coin just because someone else told you about it. Instead read and reserch the true potential of any coin that you are considerig, and you too have a chance to find the next Stratis!
Not sure on the starting point of Strat but goes with warrens view
https://coinmarketcap.com/currencies/stratis/