Actually I think both Bitcoin and Etherium will hold up not as bad as most think given that there are investors lined up in anticipation for discounted purchases at the price dips. If we consider the fact that the crash/fork speculation has been marketed quite effectively for some time, it has prepared many investors to save for the buying opportunity, in fact some are impatient and have bought in the very recent false alarms price dips. Rest assured the big investors are on the sidelines quite prepared. I expect Etherium to be sustained by its hype machine, and bitcoin by its legacy. Alt coins on the other hand, are likely to be more vulnerable.