At present, the future of Bitcoin is unlikely to be bright because the exchange rate has fallen sharply. It is unlikely that people will use crypto as a currency in the future. Hopefully in the future there will be a crypto coin that will replace Bitcoin and become an international currency.

I think it's really hard . Only trash coin often has airdrop . If you want to earn about 500$ in a month or maybe more you should join bounty campaign

I think paypal will accept Bitcoin soon when Bitcoin would be legalized in any country. As I think for now Bitcoin is better than Paypal already