I think using PIVX to pay for something is still a while away and isn't a priority IMO.
The first part is trying to attract those who actually wants to invest/hold/stake etc.
Even that isn't that easy right now...
e.g. My non-crypto friends recently asked me how to buy some PIVX after hearing me talk about it.
My first reaction was "well, it's complicated", "there's a lot to learn", "You'll need my help" etc.
1. They need Bitcoins first. (This isn't that easy on its own when they don't even know what bitcoin is)
2. They need buy PIVX through an exchange using Bitcoins. (need to learn how to use exchanges, trade etc)
3. Install PIVX wallet on their Windows PC. (No wizard. pivx.conf file editing, encryption, address creation etc)
Then they need to learn the concept of crypto addresses, staking, manual backup of their wallets, masternodes etc.
It needs to be easier. I know it's not easy to make it easy. But yeah, no way they would bother learning all this without me.
At the end, 3 guys asked me last week but none of them has yet to even buy any BTC let alone PIVX. No idea if they will.
But yeah, this isn't just a problem with PIVX but with most altcoins.