Dear Tony Sossong,
Using data gleaned from CoinMarketCap, if you had invested in Bitcoin on April 23, 2013 at a price of US$135.30, today that same investment on September 9, 2019 would be worth US$10,158.31.
The value of such an investment on annualized terms would be a gain of 7,408% with an annualized return of 96%.
But and this is an important caveat, this does not factor in the Sharpe ratio of a Bitcoin investment. Hindsight tends to skew one’s perception of the value of an investment.
What’s more relevant is whether or not the amount of risk taken was commensurate with the amount of return.
Hope this helps.