7 reasons to invest in ledder:
Cool team: https://ledder.io/en/whitepaper/team;
The revolutionary technology: https://ledder.io/en/technologies;
Powerful patent protection: https://ledder.io/en/rad/patents;
Transparent business model: https://ledder.io/en/whitepaper/business;
Tokens convertible to shares: https://ledder.io/en/whitepaper/sto;
Best development strategy: https://ledder.io/en/whitepaper/growth;
Working prototype: https://ledder.io/en/rad/developments.