It appears whatever you ate closed your mind off.
Expanding one's mind to ideas (as far fetched as they may seem) is a great exercise in thinking differently. That isn't to say that the earth is flat or not but it does allow for expanding concepts. You've found Bitcoin. To many, the idea of a digital monetary instrument is preposterous, yet you've grasped the meaning.
Don't be threatened by "flat earthers" they won't change your daily routine. They won't make planes fall out of the sky. The sun will still rise and set and seasons will still change. What they may do however, is open a doorway to finding truth. If one doesn't question and explore for answers then we simply accept what we've been *told*. In my opinion that's far more dangerous than pondering a disc with a firmament.