with a in wallet payment system i mean, users should be able to buy and sell sias in wallet without an exchange. you could implement a small marketplace for users to buy and sell sia via paypal for example.
think about a normal users. he downloads the app, want to place some files. now he has to learn crypto currencys, has to learn how to use exchanges, has to learn how to buy bitcoins, has to learn how to transfer bitcoins to exchanges, has to learn selling bitcoins for sias, has to learn withdrays sias into sia wallet... to complicated. without a easy solution for this, this will be only a plaything for techies.
PayPal for Sia direct purchase would be great and very important! The "how to" queue is really crazy for somebody who wants only see how good and usable Sia is and then maybe consider move from old cloud system or not.
how to:
1) find fiat <--> BTC exchange
2) send Proof of Identity
3) send Proof of Residence
4) find BTC <--> altcoins exchange
5) start using password manager for the first time
6) how to transfer BTC to exchanges
7) learn selling BTC for Sia
8 ) learn withdraw Sia into Sia wallet
9) finally try sia
It is not Sia's fault but this is really extremely complicated once I see it in one place.