For now, just know that personal keys are what you might want to shield if you want to keep the bitcoin safe from hackers, person error, and other possible troubles. https://www.reddit.com/r/technology/comments/v2ekzv/comment/iav9c4e/?utm_source=share&utm_medium=web2x&context=3 2FA is conceptually just like a stability token system that banks in certain nations around the world call https://bitcoin-tumbling54320.onzeblog.com/11870897/new-step-by-step-map-for-bitcoin-usd