I've noticed in the past week the alts are all increasing against bitcoin.  Previously the prices didn't move like this.  Typically when a new coin hit an exchange the price would be high for a few trades and then bottom out after it was dumped. Occasionally one favored coin would increase in value when there was some positive news.   But now the most of the alts are consistently rising - at least the ones listed on coinmarket cap. I wonder what the reason is?  Is it existing bitcoin holders moving their bitcoins to alts or is it new investors/speculators moving directly to alts?  Also, how long will this growth last?