In the past some coins has shown surprise upwards movement and ethereum been one of the popular coins has shown significant pump in 2017 and early 2018! Will ethereum get to $500 this year even if sec approved ETF?
Cryptocurrencies are no more quick profit scheme. If you want such big return invest into some HYIP and not into the blockchain technology.
Just the opposite, in cryptocurrency the risk of losing all the money is ten times less than in any HYIP, and for normal earnings it is enough to buy coins at the right time and wait for any significant rise in prices