Many investments are rocks. When you let go, they will fall back to ground. Some are balloons. When you let go, it will rise to the atmosphere. It is not easy for many to distinguish between those two. Also the balloons are susceptible to pricks. Trade wisely.
Trade wisely, yes.
But this is a bad anology, you imply that a rock won't fall until you let it go, i.e., sell. Thats just not true. Often that rock is driving to the ground and you cant get your hand off it fast enough to stop from being crushed by it as it hits the gard pavement.
Here's the line for you: bulls makemoney, bears make money, pigs ge slaughtered. Don't be a pig!