I dont think so, CS is growing.
Look as bale->neymar transfer fees and that was like 3 or 4 years ago where 100m was crazy,that record has been broken numerous times, sports grow. CS is doing really good competitively, its the lack of casuals that seen the decrease in viewership etc. Game is going strong, more tournaments more investments.
Right now because of all the factors and that i can see him being a 5m player.
Immortals duo have been put on sale for 1m (yes.. major spot with kng(who wasnt part of deal, cuz got kicked), but simple right now is such a strong player). All the reasons i mentioned above do really make him an expensive piece of meat. But a good one nevertheless.