nostr:nprofile1qqsq9k04vahllseell55m74n3047y88pzlr0z5yany32st29fapqmgsppemhxue69uhkummn9ekx7mp0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgawaehxw309ahx7um5wghxy6t5vdhkjmn9wgh8xmmrd9skctc87ckyu what is mens "Old hashrate" in the chart? Whats the differnece to "hashrate" #asknostr