Can't say I trust Ray Kurtzweil's intuition. Last time I did it ate up $2k investing in his sinkhole: Naturalnano
http://www.businesswire.com/news/home/20061214005246/en/Nobel-Prize-Winner-Sir-Harold-W.-KrotoHis commentary on bitcoin is welcome for obvious reasons. Agreed, he is better off trusted to extreme penmanship.
I respect his personal opinion about the future of the crypto-currency. At least he didn't badmouthed Bitcoin by calling it a drug dealer's currency, as someone else did a few days back. He may be having his own reasons and theories to distrust Bitcoin. But then, Ray Kurzweil is more known as an author, than as an investor.