Hopefully you can consider some kind of an investment timeline that is 4-10 years or longer, and just keep buying whatever bitcoin you can for at least a whole bitcoin cycle (4 years) and then see where you are at after 4 years, and surely if you are not very well off, then it could well take you 2-3 cycles before you might start to slow down in your BTC accumulation or to change your strategy away from buying regularly, persistently, consistently, ongoing and perhaps even aggressively. It tends to take a while to build up an investment, which is the way to go forward with bitcoin
It is really a good way to look at bitcoin investment. Bitcoin investment is not a get rich quick scheme as some may think. The four years cycle you made mention of really make sense, it will definitely be of help to investor and the mindset of expecting quick profit will not be there.
Consistent buying is the key to build a better portfolio in bitcoin no matter how small an investors can be using DCA strategy to accumulate bitcoin on regular intervals. Patience is needed for an investor to be able to hold bitcoin for one or two bitcoin cycle without panicking when there is market fluctuation. So persistent and patient play a vital role in long term bitcoin investment.