Google announced that starting June, it will ban all crypto related ads. Facebook also recently banned ICO ads on thier platform. two of biggest tech companies: Duopoly. I think this is creating an opportunity for real decentralized platforms for crypto and blockchain related stuff.
I think that this news has caused a drop in the cryptocurrency market today. The decrease in advertising is aimed at reducing the awareness of people about cryptocurrencies and this can lead to a decrease in demand for them.