Most of the people complaining about the declining price are likely those who bought at the top, or very close to it. It is like these people were thinking that despite the major surge of the last months the market would continue to gain value. If we look at previous rallies, all of them have resulted in a sharp decline afterwards. If the market reaches a point where people aren't willing to pay top dollar for Bitcoin, the price will come down as natural result. It's all about supply and demand.