"$FET There are a lot of incoming cash into the system. Better check it!!!" means the poster believes that substantial new money is flowing into FET, likely through increased buying activity or trading volume. They are signaling that this could indicate growing market interest and encouraging others to look at FET’s price action and volume.

However, “incoming cash” is an informal observation, not proof that the price will rise. Large inflows can be temporary, and crypto prices can still be volatile or reverse quickly.