The millennial argument is very strong because they will be the consciousness of the next generation. Schiff's argument about technology changing is also valid and millennials may not stick with BTC if slicker technology comes along. After all, nobody wants to be using a brick phone when everyone has a smart phone. BTC will be in control for the foreseeable future but I think taking some profit and diversifying into altcoins and even gold is not a bad idea. I know Max said he bought 1 BTC worth of altcoins around Thanksgiving and that has done very well... may be not as well as BTC now but if he holds the alts for a few years... you never know.