The Lisk network is secured by democratically chosen delegates and runs on a highly efficient delegated proof-of-stake (DPoS) consensus mechanism.
The delegated proof-of-stake consensus system ensures that transactions in a blockchain are reliably verified and approved.
It effectively permits blockchains to modify network settings such as free schedules, transaction sizes, and block intervals without causing a hard fork, as long as the elected delegates do not vote for such changes.
Lisk also conducts an external security audit, which is done by the Least Authority of Lisk SDK 5.0.0 and the Lisk Core 3.0.0, in accordance with the high-security standard. This contains work accomplished as part of the roadmap's Network Longevity phase. So, Lisk seems real and safe enough to invest in.