Even as a store of value, I'm not really sure Bitcoin can hold on to better than 40% market share or its lead in price, indefinitely. There are now more than 1500 cryptocurrencies and the odds are pretty good one of them will overtake BTC.

I note that of all the currencies in the top 10, it seems like Ethereum held onto its value the best relative to the height of the rally (or bubble) in December. It would seem then, based on that, that ETH is, for the moment a better store of value.

I'm also very concerned about how every exchange has a BTC pair for all of their altcoins, but not all altcoins have another pair. BTC is there as a trading pair for every single altcoin on every exchange. I think this condition alone lends tremendous price support to BTC that is unearned in my opinion.

Once markets develop the processing power and the willingness to add another two, three or four trading pairs to every other altcoin, BTC will see its fortunes diminish. Perhaps then, we can finally put to rest the problem of having all other coins move with BTC in price.