Coinbase is a publicly listed company, with all its assets & liabilities shared in quarterly investor updates. They store all customers assets 1:1 (ie does not re-hypothecate any of customer assets)
Enron was also public, so was Lehman Brothers. The idea that public companies can't game their numbers or commit fraud is provably false. Why anyone would have large sums of crypto (5 or 6 figures+) on an exchange is beyond me.