@djuri has some good stuff. https://github.com/btclock/btclock_v2/wiki
Yeah! That's the project👆
That thing needs a couple more number places tho 🚀
It will switch to suffix mode when the time comes, with higher prices the last decimals become less significant. Or you can chain two of them and then you have 14 displays, there are SPI and I2C expansion ports available. https://m.primal.net/Luzm.png
See https://btclock.store for the DIY kit. If you want one I recommend to order fast since I will be away for two weeks after Friday...