There is no easiest way to explain Bitcoin to any person other than telling the truth and the importance of Bitcoin. They'll never appreciate the value and role of Bitcoin to them if they won't clearly understand it that is why we shouldn't hurry to teach them but rather do it step by step until we reach the goal. Because Bitcoin is not just a few words or a simple discussion but indeed, it was a long discussion which means that it takes time for the listeners to catch up. especially when we are mentioning some technical terms.
There is always an easier way to explain Bitcoin but the problem is the understanding of the target person. The easiest way is to say that Bitcoin is like money, it can be transferred, can be bought, can be gift, and can be used to buy merchandise. Anything that is beyond introducing Bitcoin as money will complicate things. So if anyone wants to explain Bitcoin in a simple term, just tell them Bitcoin function like currency that is why it is called cryptocurrency.
Bitcoin is not like money it is money. I think the best term to use would be currency instead of money but it works different to other currencies that people are used to and if you tell them it works like it they will expect it to be the same and when they convert it could make them leave because they are not used to the interface or complex terms used by the Bitcoin community. I recommend breaking it down for them and explaining the differences not just saying it is similar to the dollar.