This in addition to it being virtually impossible for ordinary users to even get bitcoins. People here are talking about losing double-digit percentages of their purchases from Paypal forcing users to create a Paypal account, which takes like 30 seconds. What percent of your customers do you think you'll still have after you force them to do a wire transfer to a moderately sketchy exchange website, wait 2-3 days, set up a Bitcoin wallet somewhere, figure out how to do Bitcoin transfers, etc?
That said, it is becoming easier than you think to purchase BTC. There is no need to wire money anymore. In the US bitcoins can be purchased instantly with a credit card via Coinbase, as easy as signing up for Paypal.
The caveats being a 3.75% surcharge and the fact that many of the big banks will not authorize bank card transactions from Coinbase. You might have luck calling up your bank and getting them to release the hold on Coinbase transactions, but that's already more trouble and more expense than paypal.
What I meant to say is that Bitcoin eliminates chargeback fraud, because payments are irreversible. That plus Bitcoin eliminating the need for a payment processor who may freeze your money are 2 real problems that Bitcoin solves.
Theft is also solved by storing bitcoins in a hardware wallet (or 2 for a backup) like Trezor, Ledger, etc. To date no credible theft of coins stored in a hw wallet has ever been reported.
And I don't recommend to only accept Bitcoin payments. As you point out this would severely limit sales. At least sabslaurent could accept it as an additional payment option, which would provide an extra revenue stream not subject to Paypal's risks.
Seek legal help to fight your case. And in parallel, look into accepting and promoting Bitcoin payments for your business.
Heck, Bitcoin is even becoming more and more popular among B2B business suppliers (according to BitPay CEO https://medium.com/@spair/the-bitcoin-fee-market-4df1857d12b...). So if you start receiving BTC payments from customers you may use them directly to pay your suppliers without even converting to USD.