Bitstamp has been around for a long time started in 2011 and based in the United Kingdom. Bitstamp was the first exchange I purchased crypto with, and even back in 2013 they had quality KYC to ensure compliance. All transactions went through and going in and out of the exchange was a positive expereience. Bitstamp has high liquidity and transaction volume. As of April 2020, the 24 hour transaction volume is 74,000,000 USD. BItstamp has high quailty real trade volume confirmed by Bitwise and the Blockchain Transparency Insiitute.