What made bitcoin jump so high was that it was accepted by governments for a while , but as soon as restrictions appeared people started to worry about their cash also businesses which were relaying on it pulled their funds out, because regardless of people belief in it or not, they want liquidity and prohibiting the liquidity of the cash you're buying basically makes it useless and less valuable thus its price going down as you stated, also Facebook restricting crypto money ads just to cut the funding and advertising of the possibilities in the crypto world, it's all manipulations to kill the crypto world and make it more like impossible to reach, but none the less I expect the currencies if left for few more years to evolve and become unstoppable.