I am wealthy - thanks to Allah - and want to write down my will. However, I am afraid that Waqf (endowment) goes to someone who does not deserve it and that after a while, heirs may dispute over it and that it may be spent in unlawful ways. Therefore, I want, guided by Allah, to spend it on charitable causes while I am still alive and thus, not to write down my will.
There are many charitable causes and a variety of ways to be a benefactor, any of which you may adopt properly which will cause you to be rewarded abundantly by Allah out of His bounty and beneficence. Thus, if you spend your money in advance while still alive on what you consider charitable causes, such as building Masjids (mosques), it will be good and hopefully rewardable In sha’a-Allah (if Allah wills). May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.