Well it would be hard for nee currency to makes it way to the market and for people to invest with it.  As to the decision of facebook to ban cryptocurrencies on their site maybe because many of these are scams.  They are just protecting us.  Anyways, as long as my country will not ban bitcoin it is okay for me.

No worries,It is not going to make any big impact on the crypto currency market.Because facebook just banned or restricted paid promotions of crypto currency advertisements but the individuals can post or share anything about crypto currency.So facebook bounties are also not in any problem.

Good thing for facebook, because they dont even know who is the scam for every advertisement being made. Facebook will be judge like they are supporting this scams if it will still continue. Althoug it will have a big effect in the market in gaining investor in the future. But there still other social media that can still support cryptocurrencies like youtube and twitter.

The mainstream media are presenting this as bad for Bitcoin. But it's actually bad for Ethereum.

Very few ICOs are priced in Bitcoin. Most are priced in Ethereum, and the Mobius ICO was priced in Stellar Lumens. So those are the coins that are impacted by this.

Maybe the big reason behind is the BIG SCAM.
In my opinion many investors cheated by scam ICO project.
Almost everyday there is always new topic arises in altcoins section that the " project of_____ is Scam."
The effect will be huge most specially to ICO that have Facebook campaign.This is just what I think.

This is bearish news for crypto market, because it shows that a big IT company doesn't trust ICO's. Smart people already know that ICO's and altcoins are most likely in a bubble that will burst when everyone will realize that they are just worthless scams, and this signal reinforces this prediction. Also, this will negatively affect Bitcoin, because people will think that all cryptocurrencies are junk, but in the long run Bitcoin will not be affected, because it's pretty easy to spot the differences that make Bitcoin trustworthy - it's an open-source project maintained by volunteers, as opposed to startups that desperately try to sell their coin.

As i understand they banned not only ICO advertisements, but they will ban fan pages and even private accounts when someone will write about cryptocurrencies. It is sick!

It is obvious as of now crypto currencies are hardly regulated so many of them especially those who aren't able to raise enough funds turn out to be scam. Facebook just does affiliate but by promoting such links it is actually promoting the whole ICO and if they scam people will develop a negative attitude towards facebook. This is the reason why facebook has decided to reduce its advertisements related to crypto. However I feel this decision quite contradictory to a recent news which said the Mark Zuck is quite interested in cryptocurrencies and blockchain development and may step in this.

The effect will be massive and we might not see large entrants into the market as much as we want in the coming days. A lot of people got involved with crypto by virtue of what they see on social media and Facebook control majority of what people do on social media and when it affects Facebook, it then means Instagram is on with it and gradually might spread to Twitter and other social media sites.

This is a big blow happening at this time and I hope they have a rethink very soon because this ban will not only affect ICOs but also exchange sites, wallet providers, peer to peer sites and everything related to crypto.

This seems to be bad news for the companies that specialise in promoting ICOs and those launching in the near future.