Fold KK in 2nd round of 100K GBP Crypto tourney?

[Rednax]

Second round of IP 100K. BB is 30 and I raise to 90 UTG. Folded to BB. Both BB and I have about 2400. No read or info on BB except that he has been conservative so far, and that's probably all he knows about me.

Flop is 954 two suits, neither of which I have. I bet 90 into pot of 190 and BB raises to 300. I reraise to 900 and BB goes allin.

What do I do? Should I have done something differently?

[Blackjack]

how big is the overlay?

[Rednax]

LOL 7.5K, not quite as big as "the one that shall remain nameless"