The key to success here is that you need to do research and gather knowledge before jumping in with huge capital. Most of us don't wanna do this laborious work rather want to get rich via shortcuts.
No, I believe there are shortcuts are available for making profit in bitcoin ecosystem. What you are saying are applicable only when you are going for bitcoin trading but at the same time you can make easy profit out of bitcoin investment if you got nerves to hold for longer duration. This does not require any laborious long hard work.
Most people are suggesting about starting bitcoin investment at anywhere because the real potential of bitcoin investment yet to come out which might be bigger than what we have seen in the past. So, start investing even a small amount will grow bigger over the time of holding.