It’s difficult for us to tell you what to do all we can do is to advise you on the safest option as bitcoin enthusiasts, holding USDT is as good as holding fiat currency because the value doesn’t increase or decrease unless your country’s currency depreciate or appreciate against Dollar. Accumulating bitcoin by allocating certain percentage of your profits as you have done is a good investment because bitcoin’s value has the potential to increase over time and regardless of how much you invest you will have accumulated enough bitcoin with time which would give you more profit with time.
Waiting for the bear market is a waste of time so sticking to your timely accumulation is the best decision in my opinion and you should keep accumulating more if you can but always invest an amount you can afford to lose.