Through different means scammers make fool of the common people and scam them. Different types of scams through which common people gets scammed are

Paid Signal Providers : Here people who weren't able to make money out of trading do this kind of scams. People are requested to subscribe their channels, so that you'll get daily trading signals. Further they do it as a paid service. Here if you're new to the cryptocurrency network, they easily scam you. Good is to do the best research of your own, because we've got lots and lots of legitimate platforms, YouTube channels are there using which you can know better about the market.

Money Doubling : In recent days this is done through YouTube channels and telegram channels. 2X bots were developed and those were promoted. If you invest $100, you'll receive $200 through the bot. Person who promote this will talk in a very pleasant manner. Don't fall for the words. Stay cautious with such schemes.

Indicators Scam : It is also a kind of scam in which people get scammed easily through trading indicators. Here scammers function as a group and promote the indicators. Our indicator have got accuracy and other additional features. If they can make big money out of those indicators why can't they do it and earn out of it. We need to think about it before going for such indicators. Learning the indicators of the exchanges is more than enough and through this one can easily know about trading analysis.

Pumping Teams : In this pattern of scams, about coin pumping will be announced. We've got information about specific coin that we're going to pump. If you invest/buy you can make good profit out of it. It gives 2X, 5X, 10X profits. Those are completely false statements. Don't fall for it, because they make you buy and further dumps the market.

MLM : This is a commonly known scam which is much seen on every form of businesses. It hasn't left cryptocurrency as well. Here based on the members added will be the commission and through this you can make big earning. One who is in the top order makes money scamming the down members. Even they'll say that you'll turn millionaire within few months. Most of the people who gets scammed on this schemes were the college students.

Apart from this you can see more and more forms of scams in the crypto market. As the market is widening scammers try different approaches. It is our responsibility to do the best research and move forward. Give awareness, it'll help someone and make the cryptospace scam free.

I've been scammed last three years ago at telegram, and I failed on that situation but that doesn't mean I'm giving up. All mentioned types of scams should be avoided, and the help it provides to us is very useful on our daily living. Awareness is the most important in order to get rid of those potential victims, without that we won't have warnings and we might end up a victim of their traps.

It seems the same thought on this thread, Frequently Ask Questions(FAQ) & Answers about cryptocurrency scam.

Usually, people who get into traps and get scams are those newcomers in the crypto field.  I saw a different story on social media about the investment that has been scammed, a promise of a huge return upon investment.  Nowadays scammers are getting smarter, they always found ways how to trap naive and lazy people or even those greedy people that want to easy money. 

Recently I have heard many newbies asking a signal group which is obviously a pump and dump group.  Knowing the fact that this group potentially is slowly milking you, they made a group for their own interest.

Yeaah you are here for a while in escrow service.
Trusted and known names are also very often used.
But sometimes it can be real, for example I followed Bitboy crypto on youtube and IG (before I realised he is famous only thanks to BitBoy name and has only mouth full of sh*t coming out) and then some of his cooperators wrote me and showed me video proofs Bitboy delegated him to find investors who will invest Bitcoin under some promisses.

They will try anything and I can say it is very Nasty
Btw you still do escrows? What was your fee? 1%?

Money doubling is the most common of all! Majority of people fall for this when it obviously shows that it is scam. This even happened to bitcoin.org not quite long ago and when I saw it, I knew that it was definitely a scam! Most times, it takes only common sense to see it.

It sounds like "Lending" to me
You give somebody crypto so they can use it somehow (stake it, use for airdrops, futures etc)

In my own estimate, only a few people who are in cryptocurrency have never been victimized by a scam in one form or another. And it s because these scammers are so experienced and even trained to really fool people. they usually designed programs that can convince anyone to shell out the money either in fiat or crypto in returned for promised high ROI. Of course, there is always that baptism of fire...the only thing we can do is to learn from the experience and move on. Right now, am always wary of programs promising profits even for doing nothing. And yes, it is always enticing as these programs appeal to our sense of greed. Anyway, that is life. Scams exist everywhere since time immemorial...and it started in the garden of Eden and the first scammer is the devil.

If the coin traded is listed on Binance or major exchange. I dont think this could be included as a scam cause they only providing signal where the tokens could do some 5x to 10x movement. Its more like a deceiving method in which they will let you win or lose based on their target.  But if you gave money to them for trading then they suddenly gone then thats completely scam.

Not I'm being sceptical about it or didn't support giving awareness to the newcomers, but believing cryptocurrencies to be scam-free is nonsensical. The least we can do is to reduce it, I'm sure that there are some people who enter these spaces only to find a fortune, and are being affected by greediness, which is the vulnerable point other than lack of knowledge.

I didn't mean to discourage you rather I appreciate it. But personally, I think if people are entering these spaces by comprehending the basic benefit of what cryptocurrencies could give and achieve, I'm sure people are a lot be more careful and by that, it will reduce people being scammed.

Thank you for the scamming type that you share with us. We should stay away from that because I am sure the scammers will use the other ways and be different from what @OP describes. If you see that someone offers fast money to you, that will be a trick to scam you because there is no way to get fast money, especially if you do not. Money doubling can attract new people in crypto and will have a big expectation to make big money instantly so you must be careful and not get tempted because of that.