Dollar cost averaging with 1 USD per day
Dollar cost averaging (DCA) refers to an investment strategy where an investor invests a fixed amount (i.e., 1 USD) in a specific asset (i.e., Bitcoin) on a regular basis (i.e., daily).
To obtain values for more than 1 USD per day, simply multiply it by the desired amount of investment. For example, if you are interested in the effect of investing and holding 10 USD per day since a given year, just multiply the values by 10!
As you can see, investing even small amounts and holding for the long term has historically played well with Bitcoin.