To monetize Bitcoin's or 'altcoins' price fluctuations, you don't need to actually buy these coins - simply invest a small amount in an account with a broker, and make money off into price fluctuations in the exchange rate of cryptocurrencies. Also, in this case, the profit not only comes from the currency's appreciation, but even when the price falls too - by determining the downtrend in the market, the trader can bet on a depreciation of coins and making a profit in minutes.