[gojomo]

Yes. And even at "the end of BTC's existence", archival copies of the blockchain will persist.

And, some subsequent attempts at an improved cryptocurrency are likely to try to include the past blockchain balances as an initial endowment (or balances as of a certain checkpoint).

Doing so would help lay claim to being Bitcoin's rightful heir, and attract the immediate financial interest of people who've already proven their interest in cryptocurrencies.