So as far as we know BTC currency is growing wide, do you think there will be when it become a national currency?If yes, why?If not, why?

Now when BC is sky high and ETH also pretty high. DO people even give their real money for those currencies. I mean give 300$ for 1ETH or 6000$ for 1BC is too much for most people.
I mean how often do people buy crypto currency like ETH and BC

I haven't sent btc in a while.  Back when i sent btc, fees were less than 50 cents.  Maybe 3 dollars?  I went and tried to send less than 30 dollars of btc... fees show up as 12 dollars on electrum and thats with the lowest possible fee where i make it send within 25 blocks.  Now if you want to send under 1 dollar, it cost 12 dollars.  When is this issue getting fixed?  Who in their right mind would send btc for small amounts when even the fee is that much?  Its like paying 12 dollars for something you want to buy that is 1 dollar?

is it risky to turn all my money to bitcoins? anyhow this money sits in the bank and do nothing for!

is now too late to invest on bitcoin ?

Under what circumstances is trading preferred over holding?
Btc reaching 10k$ way before new year is a big shock,your opinions would be very helpful.