I think over and over to invest some of this wealth in bitcoin,
Now is always the best time to invest. But I suggest to do a thorough research first and armed your self with knowledge about bitcoin and the market. Bitcoin forum is one of the perfect place to learn and keep yourself updated with latest news and happenings in crypto world.
I am afraid that this bitcoin will be destroyed with a bull, anyone knows how long it will last?
Also learn basic trading, what is bull market (all green, price up) and bear market (all red, price down).
I think you mean bitcoin will be destroyed with a Bear. .no one really knows when bear market will last. bitcoin value is highly volatile and there's a high risk involve (thus you need to educate yourself first before investing). But anything goes with crypto world...what is $6000 today can be $10,000 value tomorrow or vice versa.