Need some answers!

Hello steemians :)
Right know I'm about investing some money in crypto coins but before I do that I need some last answers.So,for two years i'm dealing with investments with all of kinds(forex,cfds,stocks e.t.c),I have demo accounts and I was doing a lot of traing to understand this hole new thing,and I understand it,in some good way :) But,the other day I went to seminals about forex and they have a topic for bitcoin and cryptos but mostly btc.So when they started the presentation about btc the presenters wasn't very enthusiastic about it cause they believed that this hole thing is like a big bubble ready to explode and the 90 % of the room agreed with that.Actually they said that btc came to stay,and I'm wondering why btc's valuation is so high,I mean is it even posible 1 btc costs 9372 $ !!! How is that even possible?? Estimators believe that btc at the end of the year will be 10000$ and more.Second,is there any supervisors to protect investor's money who live all over the world except america??cause I read that in some country's they don't.Third,this summer in greece,if I remember well in month July,greek police in collaboration with americans F.B.I arrested Alexander Vinnik for money laundering,he did that via btc,and I come to say, that we all know the benefits and disadvantages of cryptos,If cryptos are going to be next the generation of transactions in our lives do you thing that the global elit will allow it and if they know I would like to have this answer cause stuck..
Thank you for your time