Should I get an SCRYPT or SHA256 miner?

I'm planning to buy an ASIC miner. I tend to an Antminer L9 (SCRYPT), because the profit is very high now. But the miner cost a small fortune compared to an Antminer S21 (SHA256) Is the L9 worth the high price?

I don't want just a short hype and the miner should stay profitable for some time. What is more futureproof SCRYPT or SHA256?