actually I don't understand what you mean, but basically you explained that btc is a tool for making money, but in my opinion it's not easy to explain what btc is in detail, but I think you can read and study what mk4 posted to learn about btc .

but what I know is that btc is a digital currency created by Satoshi Nakamoto, and many also make btc an investment asset.

I think OP is trying to analyze or bring up a really interesting analogy, but unfortunately, his inability or in-access to proper English and use of punctuations as it is supposed to failed him, and caused his analogy to make absolutely no sense, at least, to me.

Bitcoin is money as we all know, a decentralized money, a money like no other, how it relates to being a cup, or even a bigger cup, while altcoins are the smaller cup, I don't know, and how raining means bitcoin I also don't know, but what do know is that, Bitcoin is Bitcoin, and it is a decentralized money, money you can spend or hold at will, no banks or entities tell you or dictate to you how to spend your bitcoin, it is always up to you, that is what i call financial freedom, even though some refer financial freedom to being rich or wealthy.

For a moment think that the other person do not know anything about Bitcoin and giving such examples will further confuse him.

To start with, you should tell that Bitcoin is digital money and try to compare it with paper money. This way the person may understand quickly and may not remain in the puzzle. After giving some introduction of Bitcoin, you can give him some basic Bitcoin videos or article links and if he/she will be keen to know more about it, they will definitely study about it.

The longer a person invests in Bitcoin, the more likely he or she will make a profit. Long-term investment requires patience. If I buy bitcoins and sell bitcoins within a few days, then I will never know how much I gained by buying bitcoins. We should hold Bitcoin for a long time because of the potential. Because so far most of those who have held Bitcoin for a long time have made a big profit from their investment. As you have given the example of just filling the cup with rainwater during rain and not emptying the cup. In other words, you understand the opportunity here to buy only bitcoins and hold them for a long time. If we plan long-term with Bitcoin, we can certainly earn more from Bitcoin than we expect.

I can understand some and some of these words I do not understand. The point is this analogy is quite difficult to digest. And maybe something is missing from there. But I like your effort on this.

I prefer to think that money is water without limits (it can be printed without borders/oceans and rivers), whereas BTC is like the water of life which is only in the only pool in the world. the water is limited and cannot be reproduced but it can be broken down. because this water is limited, the more people who want to have it, the more valuable the value of this water. In the past, people sold a bucket of this water for 1 dollar and now people sell a bucket for around 30 thousand dollars.

Ah never mind I'm not good at analogies and stringing words. i just tried it for fun and following your OP.

I don't want to make things difficult. So it's better for me to guide people who need bitcoin explanation on one of the good topics which is also one of my favorite topics made by fillippone.
~5 Resources to teach Average Joe about Bitcoin~

This is the most ridiculous way of explaining about Bitcoins, I have witnessed today. Literally nothing was understood except the cups and selling part. Nevertheless OP you tried and we all appreciate it. But if you want to make a person understand about Bitcoins, then you can easily do it. Tell him, Bitcoins are digital asset or belongings, that a person buys and owns. Now if he wants, he can sell these digital coins and get back the money. And everytime the price of Bitcoins keeps on fluctuating. So buy it when price is down, and sell when price is up. Simple way to understand why Bitcoins and How Bitcoins.

The most difficult task in the world is to understand the mind of girls. Just like your post is like understanding the mind of girls. However you tried to explain Bitcoin from your own point of view. Cash crops are the most valuable asset for a country in modern civilization. Bitcoin is like a cash crop out there. Countries that export cash crops earn huge amounts of foreign exchange, so you can be on the verge of success by investing in Bitcoin.

I mean in my opinion it wasn't a great thing to teach Bitcoin to someone that wasn't really interested, the only best way to learn Bitcoin is to learn Bitcoin on their own and have their own interpretation of it, and there are going to get that if they already have knowledge on there own and experience it already. I've heard a lot of stories where they tried to teach Bitcoin to their friends and it wasn't really effective, and some are just going to blame you because they lose money on their investment in cryptocurrency. This was all a pretty normal thing that is going to happen if you just encourage them and they are not really interested in it they are just interested in the profit.

The thing is you just need to explain the basics something like here is Bitcoin, it's a digital currency blah blah, and then say something like try to take a look at it and see if you're going to like it. Because in the end if they really wanted to invest on go into Bitcoin and cryptocurrency they need to do it on there own anyway.

Sounds complicated to my understanding, OP please next time try to make your sentence simply and don't speak with words that one will find difficult to get your information. Bitcoin is a volatile asset with great potential which most bitcoiners have  seen the difference of bitcoin from fiat currency. Bitcoin was created to be an alternative payment method and not just an investment. For you to make profit you must see bitcoin as a digital gold that is more precious to keep it than selling it because of the little increase in price. The longer you hodli,the higher chance you have of making good profit.