Nick has pointed out that purchasing crypto is now possible, or coming soon, through PayPal.
With the help click, PayPal has a simple crypto explanation, too, worth a read.
However, Binance provides a significantly more detailed crypto explanation.
Crypto will only be available on PayPal through a personal account—not open through a business account.
The transaction fees with PayPal are 1.5% if purchasing more than £1000—the percentage is more if buying less.
Also, with PayPal, the spread (margin as they refer) would generally be a minimum of 0.5%.
PayPal purchase makes it very easy, but I think it is expensive.
Better to purchase Crypto through Binance if you can do that, as it is significantly cheaper.