Investing $100 every month in Bitcoin from January 2019 to January 2024 means $6,000 in total contributions over 5 years. Dollar-cost averaging meant you bought at Bitcoin's $3,500 bear market lows and kept buying through the 2020-2021 bull run. Depending on exact entry prices, the portfolio would have grown to approximately $35,000-$55,000 — representing a 5x to 9x return on contributions.