Would you DCA 20$ in to BTC or ETH every week long term ?

Guys the thing is, i have low income, i can only invest little by little. Talking about 20€ per week DCA.

I want "safe bet", so its BTC or ETH.

Wich one would you pick, if you have 20€ or dollar to DCA per week for long term.

My dream would be one day own 1 whole ETH, just for kicks.. to be so called whole coiner... its impossible with BTC, but ETH would be possible... maybe :)

If you are going to say do 10/10 eth and btc... im that kind of person who can only focus on one thing at the time, so investing low ammounts to two assets makes my brain go no no :D

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EDIT: why does it say im reddittor for 10 days ? My 1 year cakeday is coming in 7 days :)