I voted 1-2 years because I really believe in decentralized exchanges and I'm already using some of them (especially Waves DEX). They are not so more difficult to use than traditional ones, so there's really no reason to not use them.

The only downside of complete decentralization for exchanges is fiat money deposits and withdrawals. This is something that still requires some kind of verification. But in my opinion sooner or later even this problem will be solved and everyone will be able to trade, deposit and withdraw any kind of currencies on decentralized exchanges!

Don't forget there are already some decentralized exchanges out there. For example the best one I like to use is Waves DEX. Moreover you may trade peer-to-peer with another used here on bitcointalk or on another community. So there's really no need to worry so much about exchanges...Just avoid centralized ones and you'll be fine!

This is good news for both crypto-community and the athlete himself.
Never heard about ONG so far by the way...it looks to be a very little project, with low volumes, only traded on etherdelta. Not exactly the top of cryptocoins...

In my opinion it is always a good time to get rid of old obsolete fiat money and switch to Bitcoin (or other cryptocoins if you prefer)...

My favorite exchange is Waves DEX because it's decentralized and has low fees and no trading limits.

They extort many personal data and then sell it. So I think it's quite bad for users...

Yes, the only option for some coins is to store them in their official wallets.

Which coins haven't their own wallet? As far as I know, any coin with a blockchain has its own wallet...

You can't know it for sure, basically. But you can guess they are legit looking at their website, their whitepaper and their team.
Also, an important thing to keep in mind is the form. Which data are they requesting you in order to receive the airdrop? Many airdrops out there looks just scam attempts in order to extort users' personal data.

Send the amount of Bitcoin to your friend's address. Then he should give you the corresponding amount of cash.

There are many exchanges out there and it's not easy for newbies to choose the best one. I can suggest you to take a look at this comparison: https://exchangewar.info/ and this other comparison: https://coinmarketcap.com/exchanges/volume/24-hour/

Also, you can arrange a deal with a user here on bitcointalk: https://bitcointalk.org/index.php?board=53.0

It also depends on which specific coin you like to buy...

Even better, I suggest OP to withdraw all his funds from poloniex. Then just set up another account using his real informations.

Yes, yobit is not known for its fast support. But can you explain more about your issue? Did you lost money because of yobit (for example, they don't process a withdrawal, etc.)?

Yes, there are many exchanges out there and it's not easy to choose the best one. If you are just looking for the cheapest one I can suggest you to take a look at this comparison: https://exchangewar.info/

Moreover you can arrange a deal with a user here on bitcointalk: https://bitcointalk.org/index.php?board=53.0

There's another PonziCoin out there: https://bitcointalk.org/index.php?topic=1468142.0
Maybe he's referring to that as the 1st one...

There are many places where you can invest your Bitcoins. But some are less risky than others.

For example, very risky investments are HYIPs and cloud mining. Those are nothing but Ponzi schemes, so you may earn only if you invest before the others. But always keep in mind that such websites last few weeks or even few days and then disappear with all the money.

A bit less risky methods are gambling and sport betting. There are people which study sport events and then bet (they claim to make good amount of money betting on sportsbook). Yet in my opinion there's a lot of luck  involved in this business, so I think it's quite risky as well.

More safer investments could be buying a cheap altcoin using BTC. But you need to choose a project very carefully; such project should be made by serious teams and solve a need.

Another good investment you can make is to buy blue chip stocks with Bitcoin. You can do it on the website I promote in my signature. There you may also invest in indices and commodities.

You are right, buying at the right time is the most important thing. Knowing when it's the right time is not easy though... I look at the charts and see previous pattern to decide if a price is good to enter or not...

I used cryptopia once to claim Bitcore but I think I will never use it again. It has one of the ugliest design I've ever seen and the interface is not user-friendly at all...everything went smooth though and they processed by withdraw in a short period of time.

I invest in stocks, forex and indices on the website I am promoting in my signature.
Also, I am buying several altcoins while prices are still low...

I don't understand what's the purpose of storing your fiat money on exchange... 

Very complex and difficult system. Too many steps to take...