What do you understand by standard of living how do you think it can be affected by savings and investment. For instance do you think an individual who is actively trying to save and invest can improve their standard of living SIGNIFICANTLY or even maintain the one they already have?
Maintaining standard of living and investing at thesame time cam be problematic depending on the current situation or status of the person in question. For example a person who has a job that pays him $500 may decide to manage $300 or $350 and save or invest $200 or $150 into Bitcoin, if he can be able to manage the $300 for himself within a month then we can say he is investing and leaving a standard life or a good standard of living. But when he earns $500 and manage $150 and invest $350 then we may say he doesn't have a good standard of living, if the amount he uses as expenses does not sustain him for the month.
In summary maintaining standard of leaving while investing can be possible if you are not saving or investing aggressively, when saving or invested amount is too much that it affected your well being then maintaining a good standard of leaving will be difficult. So you can maintain a good standard of leaving while investing, but it can only be possible when you maintain a balance between the both.