As far as I know you can change your keys for your bitshares account. Can you please provide some good link on The Large Bitcoin Collider experiment? I don't think it's possible to randomly get a key with BTC, probably some fear-mongering.
Are you saying I am fear-mongering? I hope not because the fear is valid. Official website of LBC:
https://lbc.cryptoguru.org/aboutNot you, but crypto space has seen all kinds of most sophisticated FUD for years. Large Bitcoin Collider need provide some proofs of finding random users (not their own) wallets. If it's real this will be big news.