Wait till halving, then sell it when dumps begins. Buy again at low and wait.
To me, this seems the wisest advice. No body really knows so you can't be 100% sure but everybody expect the bitcoin price to rise this year because of the halving.
Mining isn't really profitable anymore and cloudming is even worst. If I had the amount of cash OP is talking about, I would buy BTC now and hold it until halving day.
What I personnaly believe : Price will go to moon 2 month before the halving, then crash a few days after the halving, then go up again slowly.
So basically it's a buy-sell-buy situation :-)