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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You can run a command as a daemon and save the currencies in cache every second. See a similar solution: https://github.com/mateusjatenee/crypto-tracker/blob/master/app/Console/Commands/FetchCoinsPrices.php
The only way you could improve this is by using something like Spatie Fork to run the API requests in parallel but doing that is honestly going to be a headache.
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