It is not a lot but it is slowly growing and I have many other Altcoins I am invested in so can't put everything into Bitcoin.
It's good to diversify investment but choosing altcoins as alternative over bitcoin isn't good enough, you'd better prefer other investment assets than alts as alternatives but if you think the risk involved is not beyond what you can bear enough, then you can be ok with such.
I am wondering what everyone thinks this the price of Bitcoin can realistically get to? $100k? $250k? $500k? $1m?
If you need the accurate answer to this then it's something you can derive on all by yourself, just got deep into the history of bitcoin since 2009 and check the major events that has happened, compare the all time high to the all time low and hiw this has been a continuous process within every four years interval and see how bitcoin has been volatile and ever increasing in value, such could help you predict by yourself what the future may tells andbhiwbfar it could go higher.
I am happy holding Bitcoin for the next 10 years or more if it reaches these prices above.
If you really meant business then in this you have to really practice the holding indeed and if will definitely pays than you've expected from it.
I am just debating if I should continue to DCA into Bitcoin or sell all and put into stronger altcoins which will see better ROI over the next few years.
Why are you compromising things here, you've made ut right already by investing with bitcoin, adopt the right technique with DCA, now you're introducing a spoil into it, bitcoin is the only digital currency recognized as an asset and recommended for for an investment while others were at your risk.