Seems cross chain bridges have serious problems with security.
Back in January 7th 2022 Vitalik posted this warning:
*My argument for why the future will be multi-chain, but it will not be cross-chain: there are fundamental limits to the security of bridges*
###The Hacks So Far This Year
Only May didn’t register a hack. I’ve used the term hack but this is a generalisation of whatever attack vector was used to drain funds.
**January 20th 2022 – Multichain bridge hacked for ~3 million**
**January 28th 2022 – Qubit Finance bridge hacked for ~80 Million**
**February 2nd 2022 – Wormhole bridge hacked for ~323 Million**
**February 8th 2022 – MeterIO bridge hacked for ~4.4 Million**
**March 30th 2022 – Ronin bridge hacked for ~650 Million**
**April 7th 2022 – Wonderhero bridge hacked for ~300 Thousand**
**June 24th 2022 – Harmony One bridge hacked for ~100 Million**
**July 11th 2022 – ChainSwap bridge hacked for ~4.4 Million**
**August 2nd 2022 – Nomad bridge hacked for ~200 Million**
Be extremely cautious when using crypto bridges, as these losses are just terrible.