If the bitcoins from satoshi wallet will be sold, how will cost bitcoin? We are talk about 980 000 btc, what will be in this situation

To be honest I don't think that satoshi will ever want to sell those coins. Keep in mind that his addresses are pretty well watched and if he/she or they wanted to cash out that amount satoshi identity could be compromised. Knowing that satoshi wanted to stay behind the scenes I do not believe this is going to happen.