Alphabet and Palantir stocks - sell to invest in ETF?

As the title says, question to you all: should I sell my alphabet and Palantir stocks now that they are at their highest, to invest the money in MSCI all world ETF which I already have?

I know that timing the market is never good, but here my idea is to reduce risk by removing individual stocks from my portfolio and investing immediately the gains in a all world ETF thinking about long term investment.

FYI the Palantir stock I have already sold some of it last year when it sky rocketed.

Some info about me and my portfolio:

age: 32, based in Spain, thinking about long term investments.

current portfolio is composed of:

- MSCI world 15k eur (currently +23%)

- alphabet stock 1300eur (+109%)

- Palantir 600eur (+75%)

What would you do if you were me?