-snip- I knew times when BTC fee was only 5000 Satoshi.
Now BTC price Is also I creased so many times and also now it is about 50,000 Satoshi.
This looks like Binance, their current Bitcoin withdrawal fee is flat 0.0005BTC (
previously "dynamic", based on the price of Bitcoin)
During the 2017 bubble, Bitcoin price was excessively higher than it was months ago so if the withdrawal fee is "
dynamic", it will be lower, so that must be the reason why you've seen 5000satoshi withdrawal fee.
(
not sure if Binance set it that low though considering the mining fee at that time).
That also applies to other custodial wallets/exchange with dynamic withdrawal fee, not in "
non-custodial" Bitcoin wallets.
But in Bitcoin, it's based from the network's condition and size of the transaction (
in virtual bytes).
The average 'fee rate' (
sat/vB) might increase if there are too many unconfirmed transactions competing in mempools;
the 'total fee' will increase based from the 'fee rate' and if the transaction itself is big in size mostly because of having too many inputs.