Your statement is absolutely correct, Bitcoin is a business where you must take a risk if you want to make profit.
but you must also be sensitive by making your decision, short time investment can help you reduce the risk and plan
better again, short time investment also gives you the opportunity to study and understand the market very well.
I think you are confusing the whole idea of trading as investing, and you seem not to know anything about long term investment because if you do you won't be talking about taking risks and making quick profit, because majority of people who start buying bitcoin with this same mindset end up disappointment and never reach their bitcoin Accumulation goal.
If you truly want to start accumulating bitcoin, first you figure out your discretionary income after you might have settled all your essentials need, you can either employ the DCA or Lump sum strategy depending on which suits your finance and personality and you can equally build an emergency fund along side by using a percentage of your discretionary income. By doing so you don't have to take any unnecessary risk or try to time the market to know the next direction the market will go.