As the TV host of Mad Money, Jim Cramer provides 5 key reasons against the purchase and use of cryptocurrencies such as Bitcoin. First, no one knows the anonymous inventor of Bitcoin. Second, no one knows how much the creator has reserved for himself or herself. There are several other cryptocurrencies such as Ethereum, Ripple, Litecoin, Dash, and NEM as well. Third, there is no transparency in the virtual system for Bitcoin. Fourth, there no explicit or implicit government guarantee or lender of last resort to back up the virtual system for cryptocurrencies such as Bitcoin and Litecoin. Despite the virtual protection of Blockchain for secure Bitcoin transactions, it is possible for aggressive hackers to game this software technology. This latter rationale suggests substantial risk that each Bitcoin investor inevitably needs to address.

Although many investors are now abuzz about Blockchain and Bitcoin etc, it is important for each rational investor to acknowledge the hard and solid fact that U.S. stocks continue to offer the highest average excess return than non-equity securities such as bonds, futures, commodities, currencies, and so on over the long run. For this reason, it is safer to earn an annual 6%-8% average excess return on U.S. stocks with a canonical buy-and-hold passive portfolio strategy. More aggressive active asset management may help boost this average excess return to double digits at the margin.