The get rich quick thinking should be slightly changed in order to make cryptocurrency in general to go to the roof again. That way, it would help adoption rate to increase since the demand of it won't come mainly from speculation.
Nothing is impossible with crypto as it can do crazy price movements but I am sure that by the end of the year, it won't still be legalized by at least 20 countries, making it very unlikely to happen.
I predict bitcoin and Ethereum to do at least one to two bullish runs in the next coming months before 2018 ends and it's price will have a double or triple increase/decrease in price.