Are you looking for the real reason behind the massive declines we've seen recently?
The answer is 2 words = Interest Rate.
The US is going to keep on raising it and investors are looking for save haven that pays sure dividends ... so the US Dollar that everyone has buried in the last decade is outperforming all the Cryptos, and soon the EUR/USD will hit a parity (it's $1.25 now, it won't stay like this for a long time).
History always repeats itself, one way or another.
I don't think so at all.
The USD is in a longterm downtrend and has most recently devalued against the EUR and other currencies
despite the prospect of rising interest rates. Calling the USD a safe haven is totally misguided. the most important traditional safe haven is gold - which during the last few months has increased in value against the USD as well.
The influence of interest rates on crypto valuation is close to zero. The most probable real reasons behind the current correction are:
1. Normalization of an overheated market (more than 10x increase in USD valuation during 2017)
2. US banks restricting credit card purchases of cryptos