I understand what tumblers are, but I am having trouble finding details on exactly why they are needed. Do all BC exchanges recognize coins that have been used on black markets, and thus none will exchange them for cash? Or are there some exchanges that don't care?
I am considering selling on the DNMs, but I want to make sure I have an efficient and easy pipeline to get my money back out. Do I absolutely need to tumble bit coins? Are there BC exchanges that will let you cash out DNM bit coins? What's the deal here? Explain like I am 5, please.
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