Im from Uk and we have tax-free invest accounts which i put 20k a year in. I swing trade in this account is it worth it since no taxes?

I've been day trading and swing trading in my main ISA account because I don't want to pay taxes. My main use for it was to just invest and dollar cost average into my favourite stocks but since pandemic I have made a lot of gains swing/day trading and since I don't need to pay taxes it seems the best decision. I have certain stocks I buy and hold and buy more when It dips like tesla Nvidia then I have stocks I don't care about and I know the charts very well so I will swing trade it to make small profits and I use 3x leveraged ETFs to make 10-20% gains in 1 to a few days.

Thoughts