I feel 2017 gains was a once in a lifetime opportunity and we won't see anything like it again.
January 2017

Many of the top 100 coins with a considerably small investment could have made you a millionaire today, and congrats to those who are.
$10000 in ETH at the time and you would never need to work again.
I just can't see these gains happening again, but anything can happen
Those happen in year 2017 of gaining more profits would maybe happen again this year,if all problems occurs now would be solved,and all investor that panic selling there investment will turn back there old ways of doing an investment trading,if more investor to come the cryptocurrency will grow it investment trading and more bitcoiner will be benefited.we already know that digital currency is unpredictable sometimes its dump and maybe in a split of a minute it will pump its value,but i still believe that bitcoin can achieve back its price value to the highest point,and those happen in past year will be more than happen in this year.