Advices on ARK ETF(s) ARKF Especially Should i sell or hold?

If your thesis for buying ARKF no loger holds, then sure sell it. Then again, I'm personally not convicted of the ARK funds. I would sell, but not now given the current market sell-offs, I would just hold it for a little longer.

I trust in traditional ETFs like VOO and VGT more. If you like to do it and convert them to ETFs that you have more conviction in, it is not wrong.