The more people start using it the less volatile the price will become.
- Why is it still impossible for me to pay with bitcoin in 99,99% of supermarkets, restaurants, gas stations
Because not all merchants have adopted it yet. Just 2 years ago the idea that so many mainstream business would start accepting bitcoin was viewed by a lot of people as insane, so give it some time. There's still a long road ahead.
- Make concessions to meet certain laws
What laws?