In 4 days time FB is set to announce their crypto currency.
Assuming, that is a big assumption, this will make the FB coin the biggest user base of any coin so far.
While this in it's self is huge, it is the weight & power of FB and the companies that come on board that could or probably will usher in the new dawn for Cryptos.
While the FB coin is no BTC replacement as the basis is a centralised system, what it will do is put eWallets in the hands of millions. From there the user base will expand out into other coins.
Time will tell