I tried that for a few years. It costs too much money to buy up all the Alt coins in any significant amount. Plus the total amount you'll lose will be more than the amount you spent. It is only recently (like starting this year), that the run up in all crypto has given me a net profit.
Ok i see many people dont like the idea to buy all coins, but you can also just buy one coin with my bot or the coins which you want, if you have for example 5 - 10 coins in mind. With help of the bot you can distribute your money into this coins easy and professional and if the price go then up one day you make your win, if it dont go up you have not loss to much and propably the bot is still buying for you new positions.
But look in my live account where i buy all coins from poloniex, abouth 60 coins,
http://easport.cc/poloniex_neue_ordner/watch_trading.phpI have invest there not more then 1000 Dollar currently and if such a crash again happen, means if it goes again 50 % more down it is also no problem i can put another 1000 Dollar into the coins, but if in 1 - 2 years some coins did make 1000% gain or more, then with only one coin i can recover the loose from all other 60 coins.
But what most propably can happen is that the half goes into win and maybe the half break even no win maybe some loose, so i think overall it can bring just some wins and the risk is managed better when you distribute the money into all coins, thats what i think.