Most of that gain came in a flurry of trading last Wednesday, when it gained a whopping 66%. Even with its recent meteoric rise — it's up about 900% in the past month — each Shiba coin costs just a tiny fraction of one cent.... Experts warn that investors need to be cautious about putting money into something with anonymous leadership that appears to have little functional use. Lee Reiners, an outspoken crypto skeptic, teaches fintech and cryptocurrency courses at Duke University School of Law.