Coinbase is your answer to the bitcoin woes. It has a daily cap if you only tie it to a bank account, but if you have a credit card it is a higher limit. The problem is that most people get scared of the "tied to my bank" aspect, which is a valid concern, but if you only work with a source that tumbles the coins it isn't an issue.
As for a source of dnp, I know that you can find one by digging deep enough. I'm not comfortable with sharing any information though because of the issues that both you and presser bring up. It's extremely dangerous, I don't know you or how much research into the compound you've done, I don't want others to use the information, blah blah blah blah.
So, in short, look into coinbase or dig deeper into finding a WU friendly source.
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