As an investor it is never advisable to use to trading strategy expecially as a newbie that what to increase his Bitcoin portfolio for you may run at lost on the contrary and trading shouldn't be seen as Bitcoin accumulation strategy.

Also the buy the dip strategy because if an investor keep on waiting for Bitcoin to dip before accumulating such investor may wait till infinity if Bitcoin didn't dip and also waiting for dip is a way of missing more opportunities of accumulating Bitcoin when you can accumulate using the DCA strategy that allows you to accumulate Bitcoin irrespective of the price of Bitcoin, unless investors who has gotten to their maintance level may choose to practice buying the dip strategy because they don't need be buying frequently using the DCA strategy through their reserve fund they can as well buy the dip.

I think the recommendable strategy should be the lump sum strategy and the DCA strategy since it will help in increasing Bitcoin portfolio by buying in big size or accumulating little by little using the DCA strategy and hodl for long.