In the near future, we cannot see BTC disappearing. It's so popular that people cannot tolerate its dump.
People could possibly do that for which they do decide already to dump their bitcoin which would really make for bitcoin to disappear but i do strongly believe that this thing is somehow impossible to happen knowing that bitcoin do really have lots of users which is really superior on any altcoins in the market.They might using some alts but they wont really leave bitcoin behind for sure.