Thank you for sharing this informative info, tho I am quite hesitant na madali ito ma gets ng mga new comers and hopefully they will try to read and understand this. Meron lng akong isang gustong i add.
Nag run through lng ako sa post mo and I have noticed na parang hindi mo na lagay ang double spending. There are several cases before na may iilang trades or services na scam dahil sa trick na ito.
A very simple trick na kung saan pde mo i spend ang the same bitcoin amount mo sa dalawang product, ibig sabihin na kaya mo bumili ng dalawang product sa iisang halaga lamang.
Here is some good example for that
https://medium.com/coinmonks/what-is-a-51-attack-or-double-spend-attack-aa108db63474 Pde kasi parin ito i connect sa pag kawala ng bitcoin mo or alt coin mo sa isang trade. Tho, I am not that sure if this problem still existed