What set of conditions (technical or socio-economic) can crash blockchain or bitcoin to zero USD? Is this notion of bitcoin crashing inconceivable at this point 10 years into its existence (so long as there is electricity and the internet)? My corollary question is: Can bitcoin be obsoleted by another cryptocurrency? What would that path of obsoletion look like for bitcoin? For example, I hear about other crypto currencies like Etherium or Lightcoin or Bitcash or Altcoin or Bitgold. What would be signs to look for that would make it prudent to cash out of Bitcoin to buy Etherium, for example.
I think condition where people wouldn't think anymore about internet. Because if only lost belief from people i think there are still a lot of bitcoin supporter which still use it and it still created value. Maybe something that really bad happen in a lot of countries which make internet not accessible.