It will get worse.
From Wiki
According to the National Academies of Sciences, Engineering and Medicine, there is substantial evidence of a statistical association between cannabis use and the development of schizophrenia or other chronic psychoses, with the highest risk potentially among the most frequent users.
[2] A possible connection between
psychosis and cannabis is controversial because observational studies suggest a correlation but do not establish any causative effect of cannabis on long-term psychiatric health.
[26] Medical evidence strongly suggests that the long-term use of cannabis by people who begin use at an early age display a higher tendency towards mental health problems and other physical and development disorders, although a causal link could not be proven by the available data.
[27] The risks appear to be most acute in adolescent users.
[27] In one 2013 review, the authors concluded long-term cannabis use "increases the risk of psychosis in people with certain genetic or environmental vulnerabilities", but does not cause psychosis. Important predisposing factors were genetic liability, childhood trauma and urban upbringing.
[26] Another review that same year concluded that cannabis use may cause permanent psychological disorders in some users such as cognitive impairment, anxiety, paranoia, and increased risks of psychosis. Key predisposing variables included age of first exposure, frequency of use, the potency of the cannabis used, and individual susceptibility.
[28] Nevertheless, some researchers maintain there exists "a strong association between schizophrenia and cannabis use...", while cannabis use alone does not predict the transition to subsequent psychiatric illness. Many factors are involved, including genetics, environment, time period of initiation and duration of cannabis use, underlying psychiatric pathology that preceded drug use, and combined use of other psychoactive drugs.
[29]
And now we are on a trend towards legalizing hallucinogenics.