Yes, but it's not the cure-all panacea for the world’s problems, blockchain transactions can take a while to process, compared to “traditional” payment systems such as cash or debit cards.

What wallets can I use for participation? Exudos?

Hello. Basic version of customer software is planned for QIV 2018, and beta version is scheduled for QI 2019.

Here are the bonuses:

— 25% bonus for tokens bought within the first 24 hours
— 15% bonus for tokens bought within 10 days starting from the 2nd day of the ICO
— 10% bonus for tokens bought within 14 days starting from 12th day of the ICO

If you want to take advantage of the best bonus (25%), please make sure you prefund your user account in advance, as the BTC and BTC based payments may take some time to arrive

Hello! I'm afraid in this case you won't be able to provide a quality service to the customers, which includes almost 100% uptime, redundancy and backups, to name just a few... That's why Market.space is rather B2B oriented and differs from, say, Sia Tech or Storj.
However, you are welcome to join us as a Miner, Proxy or Insurer - you don't need to be a professional host with your servers ever running for that.

why I need a Decentralized Storage？I think dropbox is fast,dropbox is enough for ordinary users

The price displayed in the first post is the base price and there is no reason for it to change. A handful of posts before yours there's a post concerning bonuses for early buyers, here it is: https://bt.irlbtc.com/view/2961359.msg34443119#msg34443119:

Launch main sale i suppose 

Having records and data decentralized, and deployed on a blockchain makes it virtually impossible for any one party to tamper with data or records. Versus how it is now, if you host your data on let’s say, your computer, you can easily edit that file, before you send it to someone else, how can I ensure I can trust you?

What are the project's long term plans? Just curious what will be the next after successful ICO end?

The answer is 'they really do'  So far we've covered in-length only Mohammed's contribution, but more publication on our Advisors and their role in the project are coming soon