As the bitcoin market matures, there is an increasing number of options available to add the digital currency to retirement plans. Bitcoin has been consistently gaining momentum over recent years, despite lingering concerns about its high volatility, energy consumption and risk of fraud. Last year, bitcoin (BTC) – the native cryptocurrency of the Bitcoin network – trounced gold and the S&P 500 with a 164% return. Gold, by comparison, rose 21% last year, and the S&P 500 Index gained 13%. Even with the current rebounding post-pandemic economy, bitcoin continues to…