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.
Only if OP is ready to risk losing all his money I think it's a good decision if OP wants some money that could change his life. This is the bearish season so I think we can accumulate some potential altcoins. If you want to gamble then we can invest in shitcoins, aka meme coins. But I don't recommend it. It is better to invest in some altcoins that you believe will gain a large market in the future. However, you must still monitor your coins because none of the altcoins are as safe as Bitcoin in storing the value of your money.
But if selling all your bitcoins is stupid, it's better to keep it in a stable coin than in other altcoins that we don't clearly understand the project, let alone on memecoin, it's far from a healthy investment, you are too excessive in assessing a shitcoin and not a good option.
For a healthy investment, in my opinion, it is better for OP 1/2 of the bitcoin ownership to be sold and the rest he diversified in several altcoins that have a good vision, the technology is needed by the market, has solid developers, a wide community and the most important thing is the project planning that was previously planned they run it well to this day.
I also sold my BTC when it hit $73k then I split it to invest in altcoins and kept 1/2 in stablecoins to buy bitcoin back when there was a decline, that strategy is much better than us gambling on alatcoin or even worse is shitcoin.