Money isn't "put into" Bitcoin. Every USD "put into" an exchange in exchange for Bitcoin was simultaneously taken out by the person on the other side of the trade.
The future value of Bitcoin in USD is entirely dependent on people in the future wanting to buy Bitcoin for USD; if no one wants to, it is not worth any USD.
The future value of Bitcoin in USD is entirely dependent on people in the future wanting to buy Bitcoin for USD; if no one wants to, it is not worth any USD.