There is water in the clouds but it still falls as rain and water is not only in the clouds, it's also in the seas, oceans, rivers and can easily be seen and felt almost everywhere. You can switch the tap on your sink and water will start running immediately.

So, there is no way that Bitcoin matches with the explanation you have made here. Gold is different from Bitcoin and they are not meant to be the same. In the case of Bitcoin and some cryptocurrencies, it's just mathematics and is up to the community to believe in it. When we believe in it, then it has value.