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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.
What you can do is to use one or more of this hardware wallets with your own node and a software like specter-desktop (https://github.com/cryptoadvance/specter-desktop) on top. This way you are completely self sufficient.
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