I like PIVX but there are so many better alternatives out there than that. The market is really centered to privacy coins and we have many competitors. Monero, Zcash, PIVX, it's really difficult to differentiate one from another because they all basically want to the same thing, or are aiming for it (private transactions) but each project is using a different approach, technology and obviously team to achieve that. Out of all the privacy coins out there PIVX is one of the least advanced one's in my opinion. Monero has already a huge market share but a good candidate to multiply your returns would be Zcash. Zcash is using by far the most advanced technology and that has been confirmed by many veterans in the industry. Research first all privacy coins before investing in one of them. After you understood how they work you'll have a more clear idea where to put your money in.