I don't know why people think Ethereum will become more popular than Bitcoin in future bitcoin was 1st crypto currencies and is most popular among people so I don't think bitcoin will ever loose is position
the market collapses it will not happen and that is just speculation because the market is sure to return to the best position and will not collapse due to price issues. so do not panic and remain optimistic for the market back
im not suprise that the ETH will go down becuase it is the effect of the ICO hype that it is current over so in this time the ethereum is returning to its original proce but keep in mind also that the price of the ethereum will go down even more
International transactions BTC provides a fast way of payment to a location you like. International transactions through banks are expensive and might take long. This makes the Bitcoin great
Waves is a good platform though but I think it cant beat ethereum because eth is more known and preffered by clients even more ICO choose eth instead of waves