If your business lives or dies depending on 25,000 euro, you should be willing to part with more than 5%. How is your business worth 500,000 euro if you can't even launch it?
25,000 euro is nothing to most angel/seed investors. In fact, it's so low it might not even be worth their time.
For an amount that size, I'd try bank loans and friends and family (loans or investment) first. It's a tricky amount to raise externally.
Travel rule is a financial reporting rule which︁ has started to apply for virtual currency businesses. They have to attach certain meta data︂ to transactions when the crypto moves (travels). The goal is to turn the blockchain into︃ SWIFT by attaching data about the sender and recipient to blockchain transactions, when custodial wallets︄ are involved.