If you use PayPal we are working on a way to convert BTC ( other crypto's ) into cash and send it to your Paypal account instantly. We'll be open shortly. The links mention will work too.
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It's better to convince your mom about bitcoin. Tell her how it works and how to make a profit.
Your mom will surely like it and she'll invest too. First, show her your bitcoin and all the transaction history.
You don't need to withdraw your money it can be the effect on supply and demand.
If you sell your coins the demand pay decrease. Hope you understand what I am trying to say.