Everything points to BTC being the winner, you think about it every other alt trades against it, and day traders in altcoins rarely , if ever go back to fiat, they just trade to accumulate more BTC. it is like the USD of the crypto world. Personally i havnt been back to fiat in over 2 years and just keep adding and trading to build a better btc position. take a good look at the OBV and Market cap of BTC over the last few years.