Gmail is the best nowdays, very safe.

I am using blockchain.info

I am not earning bitcoins with my smartphone, better to do this in traditional ways

At my opinion it could be anything, you just should like it.

Saving is very good way to get some profit in future, but when you are minier and you need your money right now, better to sell everything and recive your money.

I think it's very huge amount of coins, anyway you need to tell us what prices do you have in your country, and other stuff to calcualte, very hard to say without it.

It's very strange question for me, you just need to put a part of your money in long box for a better times, and the main rule is not to use this money when it's no needed.

Bitcoins is my choise, cause gold is something unknown for me, i don't know how to work with gold and make money with gold, better to use known ways.

I am not sure we can, but at my opinion , miners in china with can do this if they will unite, cause people who mining always have enough coins to sell and etc.

Replacing fiat is unreal for bitcoin in reason cause goverments of different countries will not get any profit from bitcoin, so for them better not to accept bitcoin.

Both of this ways are good, but everyone choosing one of them according to situation, sometimes saving is much profitable, sometimes investing is not so risky...

Replacing a paper money with digital is very strange, and i can't understand why people should do it? At my opinion paper money is better in all cases.

It's safe till you are not a rich guy with millions on your wallets and everybody trying to steal your money in different scam ways, so it's safe, yes 

Yes, i am doing different purchases in steam very often, cause i like to do it, also when i am tring to buy something online i am also trying to find a place with accepted bitcoins.

Yes it's worth to me enough, cause i believe in bitcoin and already wasted a lot of time on it, and i hope that in future i will earn many money with bitcoin.

I really want to invest my money into cloud mining but i can't, everytime something preventing to me, and everytime i am catching myself on think that it's risky.

Better to invest, cause it's will bring money for you in future, with saving you will not get enough money if your earnings is not so good on your work.

Nope, i can't do this cause it's not accepted in my country and all i can do is online shopping but i don't like to buy stuff online so i am not using bitcoins actively.

I am not sure that in 2022 percent of bitcoin users will increase even on 10%, cause it's not so popular now and nobody making ads about bitcoin...

Bitcoins is money, so the only one way what to do with money - spend it, the main question is how to? But nobody can't answer this question exept you.