Crypto investor Jenny first learned about digital assets at a Hong Kong store that promoted cryptocurrency exchange JPEX in March -- but by September she was among more than 2,000 "inexperienced" victims police said the platform had defrauded.JPEX's downfall is casting a shadow over Hong Kong's embrace of digital assets, with experts saying it has revealed regulatory gaps just three months after the rollout of rules requiring crypto exchanges to get licensed and meet investor protection standard