Some financial experts are not bullish on cryptocurrency as an investment. They wonder: Is it really the next big thing, or will it run its course? In fact, they urge clients not to waste their hard-earned money on bitcoin.

And what about blockchain, the technology behind bitcoin? Right now a variety of companies are trying to find new ways to utilize blockchain technology.

For investors, the question to ask is: Do you look for companies developing new uses for blockchain, or will this become the next dot-com bubble?

While many financial experts have mixed views on both issues, billionaire investor Warren Buffett recently told CNBC that the craze over bitcoin and other cryptocurrencies won't end well.