Maybe theiy need funds to support the daily budget.many reason why people sell bitcoin.number one reson is need money.
Yes, there are a lot of reasons why people sell Bitcoins; obviously they want to have their profit as soon as possible, the other one is, they don't trust the security of their wallet to protect their Bitcoins so they don't hold it longer even if they want too. Furthermore, they have daily needs so they really want money.