PART is the token you'll be receiving when you make your Particl investment, a decentralized and private platform for peer to peer trading. While there are many platforms vying for space here, PART does have some very interesting benefits.
This platform allows users to earn interest on their tokens via Proof Of Stake, but they also have a cold staking method which allows you still earn coins even when your wallet is offline. In addition, their platform will enable atomic swaps so that almost any cryptocurrency can be used to purchase goods and services.
The PART platform also allows for other users to build their own decentralized applications and to take advantage of smart contracts. However, while they do have some cool tricks up their sleeve, social media is pretty quiet about Particl, and I'm not sure they will be able to get this decentralized platform off the ground. Especially when there's so many competitors in this space already.
While the listings for this cryptocurrency are rather slim it is possible to buy Particl on at least one major exchange. Bitcoin is the only really feasible trading pair available. While there are others, there does not seem to be enough liquidity to make it viable to trade for anything else.
The best way to store your PART tokens is by using their desktop client. You can download this by visiting the official website. They have versions available for Windows, Mac, and Linux. There is also an Android mobile wallet, but you should keep in mind that you will not be able to claim your staking income this way.