No, these are all internal consolidation transactions from Binance. And don't use Trust wallet - it is closed source and owned by Binance. A terrible choice.

Not infrequently, but this is by far the most they've ever done at once. There is no good reason they could have done this gradually over several weeks or months and saved themselves hundreds of thousands of dollars in fees without backing up the mempool for everyone else, but this is obviously in response to the current market climate surrounding FTX and the fact they are scrambling to make sure they are actually solvent.

All Binance's transactions have now been included in a block, so the mempool is back down to around 50 vMB of unconfirmed transactions with peak fees of around 7 sats/vbyte. I would expect it to be largely cleared out by Monday.