Well, you would install the Pillar Wallet on your phone and input your private data. You own your info, and not Pillar so they never see it. You have to grant permission for a company or anyone to see it, and you can take it back at anytime. I know that investing in crypto can be confusing, but it really is exciting too. If you are interested try a small amount, any amount really, and look for projects that you see being implemented or you would use yourself. Like Basic Attention Token, they want to pay people to watch ads directly, instead of companies paying google to show you ads. Or, Decentraland, which is a world that will be completely in virtual reality, you can go to concerts, shopping, even see therapists all in this virtual world. Pretty cool stuff!