Use the information you've gathered to estimate roughly when and how much they invested in cryptocurrency, and in which coins, while deducting ...
source https://www.google.com/url?rct=j&sa=t&url=https://cryptforensic.com/2019/07/18/guide-to-estimating-cryptocurrency-portfolio-value/&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFX399u_C79uFwFtVpaFZ9k1DMZ7A
