No one has any excuse not to buy Bitcoin because of it's price.
If you don't have the money to buy a full Bitcoin at once, then use DCA and you'll achieve it after a while of consistency. We are encouraged to use any accumulation strategy that sure suits our ability and the quantity of discretionary income available to us. Hopefully, you can follow up your DCA and save for the dip alongside it and possibly during dips you can buy a full Bitcoin or a good quantity at a much reduced price while you continue accumulating periodically to reach your accumulation target within your holding period.
Giving yourself excuses instead of buying may see you not accumulating Bitcoin at all and possibly regretting your over skepticism on the long-run and wishing you were more practical with your Bitcoin involvement.
A person should invest when he thinks it's fit for himself.
Only by holding rightfully and accumulating consistently one can achieve results in the end.