Investing in bitcoin is much more risky than investing in other currencies it is possible to invest in this currency all the time but do not be disappointed if the price goes down. The long wait will double the current price it's too late to get down to 30k bitcoin is still likely to rise still a good chance to hold on.
Who is disappointed in Bitcoin when the price drops? I have never even found anyone disappointed after choosing Bitcoin and there are still many people who hunt for projects in this forum service just because they are paid in Bitcoin even though it has been determined in a dollar amount, so that indicates no one is disappointed with Bitcoin even though the risk is still there.