can someone explain bitcoins to me People also ask

Huaan Nasdaq 100ETF link A(040046),What he has done is not only good for beauty, but also good for a better world. Because his policies and measures have accelerated the efforts of all countries in the world to innovate, work hard and make progress, especially our country! In an era when people are overstaffed and not enterprising, such people are needed to promote great changes and innovations in the world!An example of US stock allocation link address: https://xueqiu.com/2584083152/274462206?. scene=1036&share_uid=2584083152

$ S&P 500ETF(SH513500)$ S&P 500ETF(SH513500)"What do you buy now? Link address: https://xueqiu.com/2584083152/266118016? scene=1036&share_uid=2584083152

Second, the investment strategy:"Historical Opportunity: US Stocks" Link Address: https://xueqiu.com/2584083152/240686453? scene=1036&share_uid=2584083152"One Investment Method" Link Address: https://xueqiu.com/2584083152/274191315? scene=1036&share_uid=2584083152