This is a spreadsheet that I have developed for myself gradually over the last couple years. I have found it very helpful for keeping track of my bitcoin holdings (great for tax purposes). No need to trust third party apps to keep your personal information – track it yourself.
There is a lot in here including;
Automatically updates prices from coinmarketcap. The top 100 coins included. Just select which ones you want to track by typing in the name.
You can even choose your local Fiat currency and get live conversion rates for any country.
You don't need to record details of every trade. Just keep track of your crypto purchases (from fiat) and what coins you currently hold. The spreadsheet will calculate the rest and keep a record of how your portfolio and holdings have changed over time (it logs this data every time you save the sheet)
I find this very handy to see if your trading is actually profitable compared to the HODL method.
Oh yes and there are plenty of 'moon math' and analytics to see how bitcoin is trending. This includes a full history of bitcoins price which updates every time you open the sheet.
This version has some bug fixes and a few new features including a 'Stock to flow' price prediction model;
free download from here. Instructions inside. You will need macros enabled if you want it to do the fancy stuff.
Let me know if you have any issues.