According to Dr. Joe Duarte, author of "Cryptocurrency 101," Bitcoin offers a way to diversify long-term investment portfolios and trade without bank intervention. Although it is highly volatile, historical data shows that its performance surpasses many traditional assets. The decline in prices of mainstream cryptocurrencies like Bitcoin may present potential buying opportunities. Cryptocurrency ETFs also provide indirect investment options. Experts typically recommend limiting cryptocurrency allocation to a small portion of the portfolio, such as 5% or less. Beginners can start by choosing an easy-to-use cryptocurrency exchange, creating an account, and then selecting a custodial or non-custodial wallet for storage.