According to
https://bitcoinfees.21.co/, it needs 420 satoshis/byte to get fast confirmations. Anyone know why the fees are going higher and higher?

I think this is really a high fee and maybe it will rise even higher in the future. Previously, we do not have to complain too much about the issue of Bitcoin transaction fee but now the issue is getting more and more attention. Its fee is rising, this is really crazy as you say. The high fees like these can affect the popularity of Bitcoin, others want to know about Bitcoin but if they see charges like this they will probably stop learning about it. I hope in the future this issue will be resolved