The main factor that provoked the recession of the crypto market, in my opinion, was the actions of the official authorities of a number of states,
who were afraid of the rapid growth in the cost of crypto-currencies and interest in them from the population.
Still, there were no measures to regulate the crypto currency market at the end of 2017.
Currently, work to bring the crypto markets activities into compliance with legal norms is underway, after which, I am sure,
there will be growth on legal grounds.