Yes, you can enter your cryptocurrency transactions in a lump sum amount, but - as you noted - you will need to send a copy of your 1099-B to the IRS.
source https://www.google.com/url?rct=j&sa=t&url=https://ttlc.intuit.com/questions/4727380-i-have-more-than-250-cryptocurrency-transactions-if-i-only-report-the-summary-total-in-turbotax-how-should-i-send-the-individual-transaction-details-to-irs-by-mail&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNHZ4XbacFQDDDsd-B90WmUKmYM7YA
