Agree with other comments that these are more coding issues, that aren't uncommon in pre-beta versions of software. But if we're talking about design issues, t

Agree with other comments that these are more coding issues, that aren't uncommon in pre-beta versions of software. But if we're talking about design issues, there is one big one that everyone seems to be missing - and that is the Proof of Work incentive mechanism. The first issue with this is that it disproportionately rewards early adopters (both via difficulty increasing every 2 weeks and rewards halving every 4 years) and requires a constant addition of new adopters just to sustain the price (to counteract the deflationary nature of new coin generation), which makes it appear more like a traditional pyramid scheme than a new financial paradigm and may in the long term behave like one. The second issue is that this has led to the concentration of almost all of the wealth in a handful of anonymous and in many cases very shady characters in a completely unregulated market which has completely inverted the original goals of the project. The third issue is of course that Proof of Work is an environmental disaster.