Op your statements are not that clear but if I may get you right, you are trying to highlights some major things one  need to know about Bitcoin before investing in it .

It is very important you have a clear understanding and knowledge about Bitcoin before investing into it otherwise you will merely succeed in it, however ,

this are some few factors you must know about Bitcoin:

-it increases in value over time: it has the capacity of appreciating in value over time.

-it is decentralized in nature: it can never be control by any governmental body.

-it is volatile : it likely changes in value over time,it doesn't has a stable state.

-it has a total of 21 million: it is very scarce and difficult to find, only a total number of 21million of it worldwide.