The head of a Chinese investment bank says he believes bitcoin's underlying technology is more important than the cryptocurrency itself.Fan Bao, the CEO of China Renaissance, said in an interview with CNBC that while bitcoin's market may be a bullish one, he believes that underlying blockchain tech is more attractive and "probably the most disruptive technology...in the financial services industry."I'm a strong believer in blockchain in terms of its wider application in our industry," he added.His comments came after bitcoin reached another all-time high over $6,100 last week, followed by a few days' fallback to around $5,500 as of press time.