Take XRP for an example, what has "constant problems with regulations" got to do with its function? You can find out its function here with a quick browse of the ripple website. Source: over 1 year ago

Suggest you read up and learn from https://ripple.com/xrp/ before posting. Source: almost 2 years ago

The cheapest withdrawal fees on Bitstamp are XRP which is only 0.02 XRP to withdraw and XLM which is only 0.005 XLM. Source: almost 3 years ago

"RippleNet customers can use XRP for sourcing liquidity in cross-border transactions, instead of pre-funding—ensuring instant settlement, lower exchange fees and more efficient use of working capital." https://ripple.com/xrp/. Source: about 3 years ago

Bitstamp’s withdrawal fees for crypto are high for some coins however XRP is only 0.2 XRP to withdraw. Source: about 3 years ago

There's a total of ~1,300,000 BTC available on all major exchanges according to viewbase.com with sell offers spanning from 42000 to 100000 and probably higher in the order book. So I'd guess if we pick average price of 70000 per BTC you'll have to pay ~$100 billion. But it shouldn't be as cheap as that because markets will react to such rapid buying and adjust their offers up in price. Or you could start buying... Source: over 2 years ago