Would you rather prefer diversifying to shitcoins that promises a short-term profit simply because you're satisfied with your bitcoin accumulation.
Before going into an investment, you must first have an investment goal and if your goals are long-term, it shouldn't be a problem, having two investments and having a long-term goal for both of 'em shouldn't be considered a bad thing. Besides patience they say, is virtue.
I understand the reason why you think or believe another long-term investment would be a bad choice when considering diversification options, because you're probably thinking that the other investment needs to be for the short-term so you can be able to get quick profits from there to sort out other stuffs in order to avoid touching your Bitcoin investment, But you should also remember that before you've accumulated enough bitcoin to the point that you now consider diversification, you must have already made availability for,
1. An emergency fund/float and reserve funds and
2. Other sources of income
And these would cover emergencies and other short-term expenses so when diversifying, you're not after making profits to sort out immediate needs because you must've already taken care of all that,it rather you're looking for an extra way to save your funds for the long-term and make more profits in the long run.
We should not discuss diversification in this thread because diversification is a discussion that is out of the main discussion that should be discussed in this thread. I don't understand why it is difficult for them to reverse the facts because here we only focus on bitcoin and not shitcoins. It would be better to forget about shitcoins and just focus on bitcoin, which is one of our goals for investing.
The input that must be considered should not be that the discussion goes off topic, so that this will continue if someone continues it. For this reason, stop providing input about diversification in investment. So in this case we only choose bitcoin as one of the coins in our portfolio.
So whatever your goal is, of course it's your decision, but I just remind you to use your money as best as possible and one of the best options is to buy bitcoin and as the OP said buy in the dips and hold on.