I have already burned this account by speaking up.

Your tokens are safe.

Their value may crash, but your tokens are not going to be "stolen" or "frozen" by the top 17 witnesses (regardless of who they are or might be in the future).

Because if that happened, then steem would be worth zero and they have a lot more to lose than you do.

And, I don't even think it's technically possible (nobody has a copy of your steem-keys).