> 2023-04-16: somebody (maybe the owner) increased the unsolved puzzles prizes again by x10. Now the puzzle #66 prize is 6.6 BTC, #67 is 6.7 BTC and so on... puzzle #160 prize is 16 BTC.

https://www.blockchain.com/explorer/transactions/btc/12f34b5...

Bitcoin was not cheap in 2023, this is someone with $50m to spare!