I think that is the right decision for you to make. because I also have the same thoughts as you that bitcoin will not increase in the near future. so we have to take advantage of the current altcoin market conditions to be able to increase the assets we own through altcoins.and don't forget to do research before buying altcoins.
All decisions are in the hands of each individual, but it would be a shame if we were too hasty in selling BTC only to chase altcoins that have less potential, it would be really regrettable, except for coins that have really provided a definite return after we sell them for the duration that we have prepared beforehand.
But, I doubt whether I will find the price when I first buy it. If the market continues to be corrected, it is possible that if it happens to advance, the value will most definitely be a series and most definitely will decrease from the number obtained when you first bought it.
If I don't have any altcoins in my portfolio, I can always sell part of my Bitcoin holdings to make money in the crypto space.
We need to be wise and take every decision in a way that would be profitable for us but one thing we need to limit is greed.
Greed am has made some people to lose money in the crypto market because they are not patient enough and went to put their funds into projects that never lasted well in the cryptocurrency market. We ought to take every necessary decisions in the market.