is it really regulated in most countries? do you know which countries are these?
My guess is that for sure all countries from Coinbase list (+ few more):
https://www.coinbase.com/globalInteresting is that Germany is not supported by Coinbase..

This is unfortunately reality as BaFin, the supervising authority in Germany for financial operations, requires Bitcoinexchanges and businesses trading this currency to obtain an expensive banking license.
As always, here is everything dead-regulated.