I think buying bitcoin from well reputed people "escrows" is the best choice , but you can also use virwox ( which accepts PayPal , though it has limits but it's always good as it's highly secured ) or you even buy BTC from local traders " in Philippines"

Payment received , thanks 

Absolutely correct , and this is what happening now ( before the hard fork which will release BTG) when people hold their bitcoins in order to get free BTGs , as a result bitcoins​ in circulation decrease " in number term" which contributes to put bitcoin price higher .

I agree with you (partially) : well these hacking attacks happen occasionally when a gap is found ( this is not exclusively for bitcoin or crypto accounts , it can happen to any online account) but the responsible number one is the owner because he "maybe" has not enough information about sucuring these acc and wallets , though he must take all possible precautions

I think it's not late to buy bitcoin ( but it will be, I think) because as you can see its price has grown increasingly from its creation till nowadays , adding to that, its supply is limited, demand for this cryptocurrency is being more important ; all these reasons can make bitcoin more expensive ,then it will late & hard to buy it ( I think every single Satoshi will have a considerable price)

I think bitcoin gold price will be decreasing progressively and the biggest point will be in its first instant , so I'll exchange it immediately into bitcoin , I'll keep holding my bitcoin .
For altcoins , I expect their prices will rise after the fork , so it's good to invest in some well based ones

The big proof we can give to those who don't believe in bitcoin survival and those saying bitcoin's going to die is showing them BTC price chart and explain them how crypto market developed since its creation till now.
its production will surely ran out (cuz the supply is limited) but this doesn't mean- at all- that the whole currency will die

What I am seeing , a lot of participants have the same issue (posts count wasn't updated 2 days ago "

Back to last fork (when bitcoin cash was created last August) BTC price has gone upper few days after the fork happened , I think the same scenario will be repeated this time ( the unique difference is the new coin which is going to be created next fork "bitcoin gold" and I assume that bitcoin price will just keeping increasing as usually .

100 bitcoins is a very big amount , first I advise you to not invest all what you have in cryptos ( personally I'd prefer to invest the big part in projects that I can control manually because it's more confident ). Secondly​ , cryptocurrencies which it's advised to invest in are : bitcoin which the strongest coin ( I reffer to holding), Eth : some say it will hit 1k $ and many others coins having potential ( and that depends on which investment you want ,wether short term or long term one )
Good luck , I wish you all success

Lighting idea , I support it and I think many persons will do so , because it helps to not loose owned bitcoins because of death , inheritants will be very thankful since they can use inherited money but what I noticed is that this service is applicable for relatively large amounts of bitcoins and such services should be created by well reputated persons/companies

What I am aware of is that when you get shocked if alt coin you invest in is dump forever and you regret every single buck you put in such project ( I wish this won't happen but you should be very prudent because altcoins can make you +1000% as well as -1000% )
Anyway​ good luck

I wonder whether this crypto coin will be used just in Kazakhstan or it will be globalised and every one will have  an access to this currency , and will it replace fiat local currency .
I think it's good that each country creates its own crypto currency so the blockchain technology can  spread its powerful influence

I don't know which exchange do you use but I think yobit supports this transfer and withdraw money (usd , euro , ruble...) I remember I deposited and withdrawed many times using ruble with payeer  bank , also I read somewhere Bittrex supports this option too .
PS : log in to your exchange account and go to wallet (you find a list of currencies BTC USD EURO ETH...) and two signs for each currency (+ for deposit ) and (-for cash out)

Bitcoin reached 6000 $ because people are preparing themselves for next fork where they will receive free bitcoin gold (which is an extra free money for holders) , and I think its price will continue rising (at least for few months later)

Bitcoin core is essentially 3 things related each one to other that collaborate in fluently way :
Development process , developers , and a reference client .
This guy from Reddit has well explained this issue : https://www.google.dz/amp/s/amp.reddit.com/r/btc/comments/5vbvkj/can_someone_explain_bitcoin_core_for_me_what_is/

10 years is a long period , right? many possibilities can take place within this period ( either positively or negatively) and all probabilities are open , it all depends on how the entire community looks at crypto money but looking to its limited supply I think BTC will continue growing ( even slowly)

To be honest , short term trading​ is risky ( especially for beginners who don't have enough experience) , I advise you to learn first trading technics , and when you are well knowledged, you can start trading.
If you want to start trading small amounts of altcoins , go to altcoins section , post your issue , experts there will surely guide you .
Good luck

You said your friend did not receive his payments , well , this can be because :
He didn't write sufficient posts ( quantity and quality)
He didn't meet what company requires ( for example he wrote in out counted sections )
He put a wrong address ( for example eth tokens​ have a specific token-compatible wallet ).
Anyway each one who's​ involved in such compaigns must respect laws and rules to be qualified for payment .
In case the compaign doesn't pay all its applicants , it's difficult to recuperate wasted money and time , but I think it's rare to happen

What you referr to as "currencies" are in most cases "tokens" which are created massively these days in the aim to make money for their creators exclusively , but this doesn't mean that they are all scamers , there are some legit projects . And you need to choose the right basket to put you eggs in .