How do you recommend handling purchase of bitcoin? Investment or Account?

I use an investment account to track my bitcoin holdings, and I have a workaround for Quicken’s inability to deal with bitcoin’s 8-digit precision. Bitcoin can also be tracked in “satoshis” (1 BTC = 1e8 satoshi) or in “millibitcoin” (mBTC = 1/1000 BTC). (See “Mastering Bitcoin” by Andreas Antonopoulos for more detail on this.)

If you track millibitcoin (mBTC) in Quicken, you can track down to the satoshi with no truncation of bitcoin balances. I download my purchases in .csv format from Coinbase, do the adjustments on a spreadsheet (convert BTC to mBTC and $/BTC to $/mBTC), and enter them in an investment account dedicated to bitcoin purchases. (Tracking in satoshis doesn’t work in Quicken, as you have a problem with fractional dollar amounts being truncated.)

To track historical prices, I created a security called “millibitcoin” with the symbol “mBTC”. I download historical BTC prices from Yahoo finance in a .csv file, perform the BTC to mBTC conversions in a spreadsheet, and import them into Quicken manually.

See: How do I import data into Quicken for Windows?
• See: Import security prices from your brokerage firm's website using a .CSV file
• Format: ABC, 123.456, 12/31/02
• Historical BTC prices: https://finance.yahoo.com/quote/BTC-USD/history?p=BTC-USD

It takes some manual effort, but it can be done. I put in the effort because I wanted to use Quicken to track capital gains across different tranches. Hope this helps.