Are HYIP really earning oppourtunity or scam ?

All hyip are a big scam, it is a programme run by criminals and fraud people, you wont ever get anything so never invest in such programme, i have invested around $200 but still waiting for my withdrawals and they dont even reply me for the same, they just want to take people money and nothing else, why would they give you such a huge profit as they are mentioning on their sites, if this could happen then everyone in this world will be rich by night. so never think of investing in this scam things.