Dear BTC community,

I've recently introduced myself to the world of BTC.  There are still some subjects I would love to be teached about.

1. The 21 million cap. Assuming there will always be people that are mining, this cap will be reached.
Bitcoin will become a currency that can't suffer from inflation. Spending them is a "loss". 

1. Is there any possibility of this 21M cap being raised to keep it rolling?

2. Like everything there exists, the of it worth is determined by its demand. Bitcoin provides anonymity, security, and a growing usage.

2. Wouldn't bitcoin be rendered useless if there were to rise another cryptocurrency that exceeds bitcoin in these qualities?

3. How will bitcoin traffic be encrypted / decrypted without miners?

Tysm!