What's worrying, even if Putin is removed from power, who's there to replace him that is fit for the job?

Most if not all opposition has been either imprisoned or killed.

A very real possibility is that the scramble in the power vacuum causes the break up of the Russian Federation into many nuclear armed states.

External administration like in post-war Germany.

Interesting. Who will the occupying powers be?

UN mandate

This begs the question:

If an asteroid was discovered coming our way and potentially destroying humanity in let's say 10 yrs, would they tell us?

Bonus question:

If the news would break, how would humanity react?

I'm not a good swimmer, but curiously I was never afraid to jump in the water. With some friends on the beach, I went out for a swim, until I had the feeling the sea was getting rougher and me getting tired. At some point, anxiety kicked in and the feeling I was loosing strength and not reaching the beach fast enough. I tried the position several times in the hope to rest a bit, but everytime I got so much water in the face that gave me the feeling to get waterboarded, I could only stay a few moments. Close to what felt as the end, I had the last strength to lift my shoulders out the water and call my friends, who saved me.

So if I hand out free drugs I won't be sent to jail?