Bitcoin's hot streak is well and truly dead. The cryptocurrency has not been able to crack above $4,000 in three weeks just 12 months after trading at more than $12,000. Signs show that bitcoin investors are moving toward a more traditional commodity, says Jan Van Eck, CEO of Van Eck Associates. "I do think that Bitcoin pulled a little bit of demand away from gold last year, in 2017," Van Eck told CNBC's "ETF Edge" on Wednesday. "Interestingly, we just polled 4,000 bitcoin investors and their number one investment for 2019 is actually gold. So gold lost to bitcoin and...