A massive bubble? A passing fad? A scam? Whatever the cynics out there want to call bitcoin, its BTCUSD, -2.54% insane rally continues to befuddle the haters and enrich the crypto faithful. Fear of missing out can have a powerful — and dangerous — influence on financial decisions. It’s playing out in a big way right now as many of those who’ve missed out on the digital currency craze kick themselves and frantically search for the next bitcoin — or something even better. But does that even exist and is it worth the risk to invest? While he’s still extremely bullish on what lies ahead for bitcoin, George Tung, co-founder of Cryptos R Us and a veteran of investing in cryptocurrencies, says there’s still plenty of upside opportunity in lesser-known coins.via